Showing posts with label applied math. Show all posts
Showing posts with label applied math. Show all posts

20 September 2016

How To Make A Great Lesson in 2 Hours After Midnight - My First #BreakoutEdu Game

I've known about BreakoutEdu for almost a year and a half. I've facilitated the "Decoding the War" game a couple different times at events with Connected Learning, and I've had a few different conversations about the game with other educators, but I would not have called myself really enthusiastic about the experience. Truthfully, the thought of playing the game myself made me a little nervous - having the answer key always makes the game seem easier. :)

Fast forward to last night - a combination of feeling a little under-inspired for the week on Sunday afternoon, randomly jumping into the #tlap chat on Twitter (Teach Like a Pirate) where one of the questions challenged us to "wow" one of our lessons this week, and a cup of coffee I drank to late led me down a rabbit hole.

Before I get into the nitty gritty, let me give you dessert - photos of kids in action, having a GREAT time at school!

Having a student take charge as the "write everything we know on the board" kid is important to a team's success










Step One: The Lock
I've had a rifle lock from my summer at Marine Corps Officer Candidate School hanging on the pegboard in my basement for 10 years with nothing to do with it. I'd forgotten the combination. Somewhere along the way of going to bed, that lock caught my eye last night and beckoned me to crack it. After spending 10-15 minutes trying to crack the combination the "right" way, I found the tutorial for drilling into the back. Bingo. I had a combo lock for a BreakoutEdu game.

The one lock in the center is my model. It ended up being great for wrapping around a duffel bag!

Step Two: Setting Up the Game
The first decision was on content for the game. I'm in a linear equations unit, so I knew that I wanted to throw some equation writing and solving at the kids. Next I planned out the puzzles/activities of the game.



Step Three: Generating QR Codes (Beware, they all look the same!)
To get a QR code, I did a Google search for "qr code generator" and found several options. All of your choices basically all do the same thing - they give a text box for inserting text or a link, you click on "generate code," and then you download your image file. Here's where you need to be careful - notate somewhere on paper or in another file what each QR code file name points to aid in sorting them out when it comes time to print or embed them somewhere. The quickest way to ruin your game could be a QR code that points to the wrong source. I made a separate code for my X and Y values (but didn't say what the numbers were for), and one that pointed to a file with equations to solve that would reveal the combination to the lock.

Step Four: Learning More Stuff (How Can I Password Protect a File?)
One of the things I like best about the Decoding the War game on the BreakoutEdu website is when you have to enter a password to open a spreadsheet for the next puzzle. I imagine this was done with some CSS or Javascript, but as the title suggests, I didn't have time to figure all of that out. I found this Google Apps script and tutorial and ran my information on an encrypted spreadsheet. In looking for the link to the script I used today, I found DocSend, which seems like a better solution, actually.
I also found this tutorial, that utilizes Google Forms and data validation!


Step Five: Gather All Your Materials
Given that it was now after 1 in the morning, I didn't want to leave any of my memory to chance, so I made a Google Slides deck of things I needed to do to set up the game in the morning, a few notes for myself, and a backup copy of the QR codes so I could print them quickly if they weren't scanning from my SMARTboard. In between my sections of this class, I also added a slide for explaining the game. 







Step Six: Advertise!
The best way for others to "get" what a BreakoutEdu game is all about is to see one in action, so I sent an email to all my colleagues this morning letting them know that my 2nd and 5th hour classes were going to breakout of the room. That's really all I said, because I wanted them to come with their curiousity. As an added bonus, my principal came and threw in an informal observation. :) (Kudos to my student who perfectly articulated what was going on).

What Will YOU Learn?
One of my classes worked really well together on attempting to breakout, the other did not, and it was completely emblematic of the dynamics of each group during "regular" class days. My morning class trusts me and each other, takes risks, they help each other, they challenge each other... it was fun to watch. My afternoon class is cooperates/collaborates much less, they barely know each others names, and they didn't really listen to each other OR me (when I gave hints). It was disappointing, but I hope to make a teachable moment tomorrow!

Should I Play a BreakoutEdu Game with MY class? 
Yes! Creating the game myself, while more "work," (it was a labor of love, really) had me more invested in committing the class time to it. The clearest testimonial for the power of the game, however, is all of the passes I had to write to class when kids couldn't bear to leave because they wanted to crack the lock!

22 January 2016

Create Interactive Number Set Venn Diagrams with Google Slides

I'm in number sets and set theory land in our Applied Math curriculum, which means I'm in the midst of my yearly debate on what, exactly, matters about classifying numbers, and what doesn't.

That's manifesting itself this year in a desire to bring more interactivity to our investigations of these numbers. While searching for activities a few days ago, I came across this self-checking Venn Diagram activity that I really enjoyed. (Okay, its not the one I actually found the other day, but that seems to have vanished from my history. LOL)

Here's another self-check style page for sets - I particularly like that a few of these questions require description of sets that are already in groups.

What I liked about the practice I found in my initial investigation was that it had students thinking of the numbers not ONLY in terms of "integer" or "rational," but square or even, too, so I integrated rational/integer with square and even to increase rigor in this activity.

My diagrams look like this:


Creative Workflow:
1. Place your circles on the Slide, change color properties to differentiate regions
2. Define your sets
3. Use an equation editor (I used the Daum Equation Editor Chrome app) to get images of numbers to save to laptop or Google Drive.
4. Insert numbers into slide, adding numbers to fill out the sets.
5. Duplicate slides for new groups
6. Share link to students

Student Workflow:
Students will be separated into groups of 3(ish) and directed to the Google Slides document pictured above via Google Classroom. Students will drag the numbers from the grey box onto the Venn Diagram and then add their OWN number anywhere to the diagram using a text box.

I made a separate page for each group in this one Google Slides file to keep the open/close/grade/repeat to a minimum for my groups. It could end up just being a copying situation, too, but I like the layer of potential scaffolding in place of the other groups being able to see what each other is doing.

Alternatives:
Paper. Yeah, you could. There's less of a penalty if students need to revise their number placements this way, though. Instead of erase or start all over, its as simple as dragging.
Google Drawings. If you are working on a laptop of desktop and can edit Google Drawings (not possible on my class iPads), you could accomplish the same interactivity with a Drawings file. You would, however, lose the scaffolding I mentioned above.

Can I get the file??  Sure - make a copy. :)
https://docs.google.com/presentation/d/1dnL4UM94SE2WYzC24nPFS-l-p4MhQVworTy55PJus2M/edit?usp=sharing

05 October 2015

UnGoogleable Question - Oct 5, 2015

This question is not high on the "UnGoogleable" scale, but another important aspect of real questions for our students is that they are timely.

When freshman came in this morning talking about who all had been drinking over the weekend and embellishing stories of "the best way" to sober up, after taking a minute to get over my frustration/anger at the absurdity of the chatter, I wrote this problem on our whiteboard for their Do Now.

More than the math our kids can perform (which several kids "successfully" calculated to be 2.5), it matters who they are now and what they are becoming. I don't mean to imply that kids drinking at a party is the end of all sins, but I think it is important that my students know that I care about what they do when they aren't with me. I'm not a math robot, so I refuse to teach like one either. :)

31 March 2015

The Infinite Chocolate Trick, Tangrams, and Area on the Coordinate Plane

With 2 months to go in this semester, it'll be time this week to begin the work on the last big project in my Applied Math class where the kids use tangrams to study area, the distance formula, and linear equation writing. Usually I hook the kids with a day of playing tangrams to practice the spatial reasoning, but before that, I played this video of "The Infinite Chocolate Trick," where the user supposedly breaks off a chocolate bar, moves the pieces around, and winds up with an extra piece of chocolate, which if its true, would mean extra surface area just materialized out of nothing.


I didn't know how much the chocolate video would pull them in, but I'd declare it was a huge success! Kids were jumping out of their seats to come to the smartboard and try to explain their hypothesis on where the chocolate was coming from, several theories were floating around the room, and kids were asking me to play the clip over and over so they could try and catch what was happening. It set up so well for the essential question, someone actually REMEMBERED it today without me even asking. :)

For the next layer of the learning I started class with a Do Now of a triangle, circle, and rectangle on a coordinate plane, but with the relevant sides laying horizontal or vertical so the lengths could be determined just by counting units.

After we reviewed the solutions, I had to students focus on the example projects above the whiteboard and asked, "Looking at the projects up there, why do you think we started with these specific problems today?"

A student jumped right into, "So that we can prove that area of a shape is the same even if you move the pieces around..." Granted, that wasn't really why we started with that specific Do Now (I was setting up the distance formula), but I was glad that EQ stuck with her!

The official essential question for this unit is:
"How can you prove that the area of a given polygon is constant, no matter how its parts are arranged?"
Practically, the kids will be thinking, "Can I show that the area of my tangram goose (or sailboat, candle, fox, etc) is the same as the square my shapes came from?"

This project covers:
Area on the coordinate plane
Distance formula
Linear equation writing
Parallel and perpendicular lines/equations
Spatial reasoning
Using tools appropriately (measuring with a ruler, setting up their grid paper)

Here are some examples of previous years' work:
Instruction/example handout


An example of a kid who had all the required elements, but it WASN'T pretty.


If you've listened to either of the podcast episodes about our statistics based project based learning unit, you'll remember I was very frustrated with how little buy in my students showed behind what I thought was a highly relevant, meaningful project. This one is less relevant, so I wanted to make an extra effort to start with a strong hook and have an experience to draw from when the kids seemed to be lost on the connection or purpose of our work in this unit.  

11 November 2014

Student Tips for Dividing Polynomials by Monomials

I used one of my exit slip writing prompts today and these were the results. Some of them are actually useful, and others might only be useful to the kid who wrote them, but seeing the confidence on a kid's face when they leave knowing that they were able to give a tip about what we did in class is priceless.












23 October 2014

Special Right Triangles - Really?

What's in the list you keep (internally or physically) of things we still traditionally teach in our math courses that just feel "wrong" in 2014?

Memorizing formulas is probably one of my least favorite things, and I know I have that in common with my students, so wherever and whenever possible! I like to teach them the concept on a pattern level or with strategies that have more than one application. In other words, if the only reason for me to teach it is to maybe get lucky and steal a question or two on a test, then I usually won't stress it.

I was having a good week with my Applied Math class. The kids have been more or less focused recently, and we were all getting along. Kids love Pythagorean Theorem, for some reason. Right up there with "y=mx+b!" It's hard to find a kid who at least doesn't think they know how to use it. Taking advantage of those good vibes, I would have rather rolled on into circles, but the ugly special right triangles lesson stood in my way.

I went through the trouble of having them use Pythag the night before to actually solve the SRTs, and my first example showed them again how they can just use Pythag on any right triangle to find a third side. Good feelings were still flowing, and then our first question from the book had a 60 degree angle and ONE side. "Try and do THIS ONE with Pythagorean Theorem," it seemed to taunt me. I took the bait and walked the class through the relationships. And one by onem my confident students fell to the wayside, and my focused, eager students started to check out. 

So, why? Why invest time in a chunk of knowledge that isn't necessary if you know  Pythagorean Theorem or basic trig ratios?

Here's a note sheet I plan to share with my students tomorrow to articulate the alternatives again.

09 October 2014

Student Tips for Simplifying, Multiplying, or Dividing Radicals

To wrap up the lesson today, I had my students try to process their learning with an exit slip giving two tips for simplifying, multiplying, or dividing radicals.

Some of them referred to some notes we had written yesterday, some referred to something I'd said in the last couple days, and some used a kernel they'd picked up during class today that helped it click for them. We had a successful day, I think.

The "or dividing" is awkwardly  tacked onto the end of that heading because after I wrote "2 tips for multiplying or simplifying radicals," someone piped up, "Can we do dividing, too?" You win, students - its your class. :)


02 September 2014

You Should Sponsor the School Store (and Other Cockamamy Ideas)

"How come we don't have a school store, Mr. Baker?"
A senior came into class this morning, frustrated that she needed a notebook or something, yet legitimately had not been able to get it.

"Well..."
This was it - my chance to shut her down and focus on performing rotations on 2-dimensional shapes in the coordinate plane, or to grab this and run with it.
"That's a good question. I don't know. You should propose it to Dr. Hopper." I believe our building principal has a soft-spot for student-led initiatives, so I knew that a passionate plea, supported by a thoughtful written proposal had a shot.

"Hey, everyone," I got the class's attention. "Elle is proposing that we start up a school store, and we're looking for people to help with the proposal. Who's in?" A couple hands shot up, but they didn't know what they were actually volunteering for, so we settled on just one other student.

I spent the next couple minutes sharing our principal's contact info and outlining/facilitating aspects she would need to consider for their proposal. We got it to a "this baby is yours now; run with it" place, and resumed class, but I fully intend to return to this proposal if/whenever it comes up again.

"Tell Dr. Hopper, I will sponsor you," I told the school-store team. (Which sounds crazy for a father of 3 that's already on 3 committees and mentoring a first-year teacher). But I meant it. And not because I think they won't follow through.

We ache and plea for chances to inject "relevant" work into our math classes, and time to develop "real-world" problems to include in our unit instructional plans, but how often do we ignore the opportunities right in front of us because they might fail?
What would your students come up with?
Maybe the school store isn't going to be your students' idea, but I think this list applies to most ideas your students might need help getting off the ground. When you agree to come alongside a student-led initiative and mentor the process you're sowing a bountiful harvest of "teachable moments" and "relevance." Even if the school store idea doesn't go any further than writing the proposal, look what I'll already have the opportunity to model for my students:

  • Professional, formal writing
  • Organizational planning
  • Digital media creation
  • Collaboration
  • Budgeting
  • Problem solving (and anticipating new problems)
  • Figuring out what math fits into a given scenario and how it can support our case or help in another step of our plan
  • Revision/Draft process of writing

I have a motto for myself this year, and I made a sign that is taped outside my door: "I am an ally." A friend asked me last week what it meant, what was I fighting against. I told her, "I'm fighting for kids who need someone to care for them. Kids who need someone to listen. Kids who need an advocate. Kids who need someone to stand with them. I think its going to mean different things to different kids. I don't even have to agree with them all the time (USA and USSR in World War II, anyone?)."
I have no idea where this ally gig is going to lead the rest of this year, and no one else has even asked me about the sign, but if for no one else, I know, for MYSELF, that I committing to supporting cockamamy ideas as much as I have capacity for.

30 April 2014

Using Paper Slide Music Videos to Reconceptualize Content


Today's post is a super-easy way to integrate video creation into your class. All you need is one tool to record video (smartphone, tablet, digital camera, flipcam).





Resources:
Lodge's resources (mp3 and lyrics) on Discovery Streaming

My Students' Videos
My first attempt at paper slide music videos I attempted to have each of my 3 classes collaborate to make one video, which turned out to be a mistake. Only 1 of the classes were able to pull it all together and finish.


This week, for my second attempt, I split the students into groups of (up to) 4. It was good for forcing more accountability for the work, and because it required fewer students to all be there/have their materials/do their work, we had more measures of success.



                                          

Lessons I've Learned about Paper Slide Music Videos (in case you didn't read them on the post-its) :)

1. Make your videos in groups of 3 or 4, and let the kids self-select. 
2. Don't be stingy with materials. I counted out enough slides for each group to have enough, but there will inevitably be crumbled slides on the floor that need to be redone, so keep a stack of extras on hand for the kids to access.
3. Reteach and reconceptualize the content throughout the process. The thought required to package the idea of proportions visually is more than simply solving problems out of your textbook, so you may be shocked about misconceptions students have along the way. Use it as a teachable moment.
4. Celebrate! Producing these videos in one take required my students higher levels of organization, perseverance, and attention to detail than I'm used to seeing from several of them, so it was a delight to be able to breathe a sigh of relief and congratulate them when they were successful.

17 April 2014

Supersize the Floorplan Area Project


Designing a floor plan to have students calculate and study area is pretty standard fare for a high school Geometry course, but the further we get into the CAD-era of drafting, the further it gets from relevance.

The only way I've ever seen this done is on grid poster board or with grid paper. It's good for modeling how someone might draft up an informal plan at the kitchen table or your workbench, but its completely unlike what "real" architects, engineers, and designers do at their desks. Your students might get some exposure in the career and technical ed department with the heavy tools from Autodesk, but there's no reason you can't get everyone a quick exposure from these free tools.

Google SketchUp

My students are in the middle of a project right now designing a water park for a fictitious town in southwest Missouri using SketchUp to lay out the 2D geometry, pulling up into 3D shapes, wrapping it with colors or images, and adding dimensions. You can add some pizzazz to your plan from the extensive 3D warehouse gallery of items contributed by SketchUp users.

I'm not mandating this for our purposes, but you can also add any text you want for identifying parts.

When you're done you can export your SketchUp to 3D printers or as images to be embedded anywhere else on the web.

How to get it:
SketchUp is available for download here for your personal use, but its software, so you'll have to wait for someone with admin privileges to install it for you at school. (I always hate coordinating this, so I stay away from locally installed apps whenever possible).

You can also run it with a browser plug-in from this link. I haven't tested that yet, but I imagine it might get slow at times. On the positive side, your students will be able to use it at home without having to install it on their own.




Autodesk Homestyler

Homestyler is marketed directly toward consumers wishing to design for their personal home or office. Therefore, there's less to offer to the "power" user, but its easier to pick up and use for your students that might be wary toward the technology aspect of your redesigned project.
My favorite parts of Homestyler:
  • When adding doors/windows/appliances to your model, beyond the generic options are brand name designs that you could specifically purchase at your favorite home improvement warehouse. 
    • Adding a budget or cost layer to your project because as simple as keeping a window open to homedepot.com or lowes.com
  • Exporting images AND interactive walkthroughs 
    • Users have a choice of several nature backdrops to have peeking behind any windows, and can even choose a setting to have the sun shine through. The point is to get a better feel for how a paint color would look in the afternoon sun of your actual home, but for your students' fake floor plans, it just adds an extra pop.
How to get it:
Not only is Homestyler free, but its also a web app, which means all your students need is the url to finish on their own at home. Launch the web app here. (requires Adobe Flash)

CONFUSION WARNING: There is also a Homestyler app in the iOS app store that has a completely different interface and functionality. The app directs the user to take a picture of the room they want to style and then add elements layered onto the image of that space. From a consumer standpoint, its a lot simpler than having to measure and layout your space like you do on the web app, but for the purposes of your floor plan area project, its useless.


Honorable Mention: Free, online tools that may also work for your project

RoomSketcher - looks a lot like Homestyler


14 April 2014

"Lying" to Your Students for Good - Crafting a Story to Engage Your Students


I'm lying to my students this week, and I think its okay.

Let me tell you about the town of Oklaville, MO...


If you're not from Missouri, you may not know, but "Oklaville, MO" is a completely fictional town that I created last week to hold a fake competition for designs for a community aquatic park. I created a relatively simple website in iWeb (but probably could have used Google Sites as well) and hosted it on Dropbox using these instructions.

This "design a water park project" is the marriage of something I've been wanting to do since February (use Google SketchUp for designing and area) and fixing a project that is never really as good as I want. The prompt for the design actually comes from my textbook -


The last two years when I had my students do this project, I gave them a clean sheet of 1cm x 1 cm graph paper, and it usually came back to me in a pretty rough draft that hopefully was not totally wrinkled. They were uninspiring to say the least, but maybe that wasn't completely the students' fault. Is there really a lot of sense in taking pride in a fake water park on a piece of paper that literally no one else but the teacher will see? I wanted them to look better for the sake of work ethic and pride in work, but honestly, I was kidding myself.

When the situation arose again this year, I knew it was time for something different. I just the last couple weeks spent many hours designing a website for my friend trying to launch a side-career in Gospel music, so I had design heavily on my mind.

Take a second to go back and peruse that site if you haven't yet - its three simple pages, but they look pretty legit, right? I included a "real" seal, an address for city hall, and a couple of examples. If you take 5 seconds to do a Google Map search for that address, or even Oklaville itself, you'd know it was fictional, so when/if my students get to that point, I'll easily fess up and tell them much of what I'm writing here.

Is it deceptive? Probably. It may be risky when I tie so much of my relationship building to honesty, but I'm really counting on the relationship we can build during this project as a serve as Google SketchUp mentor.

Is this for you? I don't know, but a colleague of mine pointed out all of the times she lies to her students when they ask her if something they do is going to be for a grade. We've probably all done that several times, but for what? A single piece of paper, 10 minutes worth of work? When you create worlds for your students' work, they can get real skills out of it.

Chuck's Tips for Lying To Students (for Relevance)
1. Take time to pay attention to the details. 
It's kind of like The Matrix - your students won't know things aren't real unless they are really looking for it.

2. Prepare multiple sources of "reality."
Besides the three pages I created for the website, I also registered a new Gmail address and crafted an official looking memo for another copy of the "proposal requirements"



3. Be non-chalant about everything
I showed this to all of my students today, but I pitched it briefly to just one student on Friday and was able to get him excited about it all weekend.

4. Have a real prize, reward, or recognition ready
Of course, there isn't a real Oklaville City Council waiting to vote on my students' submissions, but that isn't any reason why I can't make a big deal out of the best submission. Have a panel of your colleagues come in to judge once you let the students in on the secret. One student asked if he could have a medal if he wins. Sure!

5. Have fun.
The whole reason you're doing this is to bridge a gap between worksheets, bookwork, and teacher-driven assessment to something that is more authentic, more engaging, and more fun. Be creative in the setting you create, and cherish the enthusiastic conversations you have along the way.

15 May 2013

DEWALT Mobile Pro iPad Calculator - Demon or Delight?

Note: I have no affiliation with DeWalt - I just love calculators!

This is either the best thing to ever happen to tech school, shop/engineering courses, and applied mathematics, and maker spaces or it will go largely ignored in education.

You have to choose sides with the DEWALT Mobile Pro Calculator - do you think its necessary and helpful for your students to memorize formulas, conversions, and common reference measurements and values, or would you rather take the memorization time and errors away so you can spend more time doing real (ugly, scary, student-centered) stuff? [I know, like I really gave you a choice, eh?]


FIRST IMPRESSIONS
There is so much loaded in this app! It opens right to the main content screen and you find a scrolling menu on the lefthand side that seems to have all of the calculating options.

"Hmm. Pretty extensive," you think. "Wonder when I'll get to the in-app purchases."

And then you keep scrolling. And keep scrolling. I wasn't going to list all of the functions you get for FREE in the app because it's a long list, but look at this!

  • Loan Compare
  • Notches/Holes, Joists
  • Notches/Holes, Studs
  • Wall Opening
  • Rough Opening
  • Studs
  • Volumes, Various Shapes
  • Areas, Various Shapes
  • Perimeters, Various Shapes
  • Pythagorean Theorem
  • Gross Profit Margin
  • Cost of Acquisition
  • Marketing ROI
  • Trim, Casing
  • Trim, Crown Molding
  • Trim, Running
  • Odd Shape, L
  • Odd Shape, U
  • Odd Shape, Multiple
The calc has templates AND overviews built in -
Your students can pick up the concepts behind the templates
along the way

[Still there? Keep scrolling!]

  • Roof Gable
  • Stairs Landing Height
  • Baluster Spacing
  • Common Differences, Rafter
  • Rake Wall
  • Roof Underlayment
  • Rafter, Common and Jack
  • Roof Hip/Valley
  • Deck Footing Size
  • Roof Conversions
  • Deck Boards
  • Deck Load
  • Roof Shingles/Square
  • Roof Dormer Ridge Board
  • Stairs
  • Ohm's Law
  • Floor Joist Span
  • Total Gross Wages
  • Deck Post
  • Calculator
  • Concrete Slab
  • Drywall, Total LF
  • Paint
  • Area Conversion
  • Auto Lease
  • Auto Loan
  • Concrete Bags
  • Date Conversion
  • Discount
  • Fuel Efficiency
  • Gravel/Stone
  • Length Conversion
  • Mass Conversion
  • Mileage Reimbursement
  • Mortgage
  • Compound Annual Growth
  • Percent Change
  • Sales Tax
  • Savings

[You can do it! Almost there!]

  • Seller's Net
  • Temperature Conversion
  • Volume Conversion
  • Energy Conversion
  • Force Conversion
  • Power Conversion
  • Pressure Conversion
  • Velocity Conversion

This list does not even include the more specialized electrical, business, concrete, carpentry, landscaping, etc packs that you can add on.

VERDICT
Much like when students still need to know what to put into formulas on exams when they have formula sheets (statistics, geometry), whoever uses this calculator must still have a brain and know what they're entering into the template and why.

If your goal is to assess students' memorization of facts and figures and hand calculations, then this app isn't for you. I were teaching engineering, electronics, or technical courses, I without a doubt would want my students to download this calculator to their favorite devices. If you are a math or science teacher that wants to explore more project-based learning, this app would answer a ton of your "what do we need to know" questions. If you aim to get your students solving real problems and applying real principals to their problem-solving toolbox, you should give this a try.

At the very least, download it for yourself! (or your favorite tradesman, handyman, or do-it-yourselfer)