Archive for the ‘Activities’ Category


Volume and Surface Area

May 12, 2017

I’m trying to get back in the mode of sharing what I’m doing in my class. The worksheets that I use for volume and surface area are probably some of my favorites because of the way that I scaffolded them. I first saw this technique of using shapes to code what information goes where when I was paired up with a CTE (career and technology) teacher several years ago, and I adapted it for my sections on solid geometry.


Volume WS
Surface Area WS
Spheres WS


Clinometer Project

July 7, 2014

This was a really fun project (for me, at least). I’m actually pretty proud of the clinometer that I ended up making. I took a basic protractor graphic and added the degrees and instructions.


I bought a bunch of hex nuts to use as weights. I had enough that if students wanted to keep their clinometers, they could.




Here’s the hall pass I made. I suggest making them BIG (3 to a page) and brightly-colored.


I thought this was a really good project. As with the mirror project, I think I’m going to have them just measure in centimeters/meters. I also want to try to find another angle of depression location.

Obj. 42 Elevation and Depression Exploration


Proportional Relationship Project

July 4, 2014

As I said in a previous post, I decided to take the meaning of “geometry” (measuring the earth) to heart by having several projects where we left the classroom and measured stuff. The first one I did was at the beginning of February where we used mirrors and meter/yard sticks.

Michael’s has some pretty good square mirrors that I was able to pick up pretty cheaply. I also put a reinforcement on each mirror to give them a point to measure from/to.

Generally, this was a very successful project. I started everyone off at the same place, which was just outside my room. As groups finished this, I could send them along to the next station, which was just down the hall. As far as I know (**g**), I didn’t have any students go AWOL on me. When I do this again, I think I’m going to have to bite the bullet and just measure in centimeters. As much as I want them to get the practice of measuring in inches and feet and using fractions, it’s not worth the hassle for what I’m trying to achieve. I may also add a direct measurement of the first station, so they can check their work.

Obj. 37 Proportional Relationships Project


Quick Idea from #TMC13

August 4, 2013

I just thought of this as I was reading some recaps of TMC13: During “My Favorites”, Chris Lusto offered the idea of having students work out the definition of a circle.

What just struck me was one of the activities challenged the students to come up with an example that fit a classmate’s definition but was not a circle. COUNTEREXAMPLE!! Counterexamples (especially geometric counterexamples) are so tricky for students to get. Here’s a built-in example of why they’re a big deal. Love!


The Mother of All Scavenger Hunts

May 6, 2013

I was inspired by Cindy’s QR Code Scavenger Hunt ever since I first read it and realized I could use the iPads that I didn’t know what to do with. I really liked her idea of having the QR codes output plain text, but I quickly realized that this wouldn’t work for a geometry activity.

I finally decided to do this as a final pre-STAAR review activity that would get us out of the classroom, and would let us review without using a packet of worksheets. I apparently also lost my sanity and decided that I wanted to have each answer choice be a separate location with its own URL (and I wanted to have 15 questions). Since everything was going to be done through the QR codes and a spare WordPress site, that’s 15×5=75 separate QR codes and blog entries. **sigh**

The next step in my madness was the inspiration of using locker numbers to handle the 75! locations I needed. This meant I had to wander around the whole school figuring out which locker numbers were where. Once I thought of the lockers, I thought it would be cool if, on the locker with the correct answer, the students could open the locker and find a token to bring back. Time to contact the assistant principal in charge of the lockers to find out combinations to 15 lockers. She ended up just letting me borrow the notebook — yay!

Token 1

Now the work began. I actually used the random number generator on my TI-84 to randomize locker locations (I assigned each main block of lockers a number), and then created a spreadsheet for the question and answer choices locker numbers. I used my trial version of Kuta to create the 15 questions. I then scanned the document (since it won’t let you save as a PDF on the trial version) and then created blog entries for each question, incorrect answer, and correct answer (including the combination to the locker). This gave me URLs that I could paste into the QR generator, which I then copied and pasted into a Word document (one page per question).

QR Codes

The afternoon before the hunt, I went around the building with my QR codes and my tokens. Copying Cindy, I also made Hall Passes for each of my students, as well as worksheets for them to use to show their work (no credit for the token without the work).

Hall Pass

How did it go?

Good things:

  • The kids got into the idea of the scavenger hunt, and once they figured out the locker thing, they all worked pretty well (I put them in teams of two).
  • My codes created a lot of buzz around the school. I had at least three non-math teachers come up to me and ask me about my scavenger hunt — they had scanned the QR codes and saw my name.
  • I was especially pleased that my principal found a group that was working on a problem, and they told him that they really liked the activity.
  • Considering I had 75 codes around a building with 2800 students wandering around, I only found 4 codes that were torn down. Even more important, none of the lockers with tokens were messed with.
  • It was also useful for my students (who are all sophomores) to see parts of the building they may not have seen before, since I used every bank of lockers in the school.
  • Students could use their phones as well as the iPads, which made a nice division of labor.

Not-so-good things:

  • Out of the 15 problems I created, the most any team completed was 5. I think next year, assuming I do this again, I will group the questions and answers closer together so students have time to answer more questions. In principle, it makes sense to spread things out so students are less likely to just scan codes, but as big as our school is, it just may not be practical.
  • Lamar

  • I had to double-check all of the codes on the second day because of other students’ messing with my codes. Yes, it was only 4, but I still had to check all 75.
  • I had forgotten until the morning of the hunt, but one of my girls had torn ligaments in her knee. Oops! She managed to make about half of the problems, but then she had to sit down.
  • Teenager drama — “I don’t want to work with her any more; she’s a b****!”
  • I was exhausted! One evening running around the school preparing things, two days running around the school monitoring students, and then going around taking down all of the codes and retrieving all of the tokens.

Overall, however, the good things definitely outweighed the bad. I think that now that I have the process in place, I will probably do this again next year.


Pirate Treasure Hunt

August 21, 2012

I wonder if I can put something like this together for “Talk Like A Pirate Day” (Sept. 19th). Cool scavenger hunt idea–especially using a locker and its combination.


Showing Respect Exercise (First Day)

August 12, 2012

This is an idea that came to me in the shower the other day (which is one reason why my water bill is too high):

Last year, I had a very hard time convincing my seniors that I was in fact not background noise, and that they needed to be quiet and listen during lectures. As a general rule, both of my senior classes were fun classes, and there definitely was learning going on. I was just frustrated that a few students could hijack things and make it difficult for others to focus. I thought of an exercise I might try the first day to address this.

  • Ask students to raise their hands if they are in drama or StuCo. Pick two students to “volunteer”.
  • Give each student a script. One student’s script is a description of the basic facts behind the 1066 Norman Invasion, and the other script is a description of the most recent Rangers or Cowboys game (I’m not sure which I’ll use).
  • Their instructions are to read the scripts at the same time in a normal speaking voice. They are welcome to add whatever dramatic emphasis they wish.
  • At the end, I will put up a Powerpoint slide with some basic questions about the 1066 invasion. I want to make the point that not only did the sports speaker not hear the information, but the rest of the class was also distracted from hearing it.

I thought about doing this with math, but I wanted to pit text piece versus text piece.

From here, I think I will ask the class what they think “respect” is. I’ve usually operated under the assumption that all of us know what it means, especially since these are 17-18 year olds, but maybe it would be a good idea for us to have a discussion about the concept. We’ll see.