## 2.13.2010

### Week 23 and 24

We're finishing up our unit on linear equations and ended it with scatter plots and the line of best fit. For some reason, I enjoyed this topic and we did several interesting activities involving them.I did this age of famous people activity suggested on Twitter by @Fouss but I redid it myself which I tend to always do. It worked pretty well and each student had different types of correlation which was helpful. We also did this spaghetti linear lab which I stole from http://www.ilovemath.org. It was interesting and I really liked it, but you need tons of pennies! One piece of spaghetti will hold up to 50-60 pennies and the experiment tests out 5 pieces of spaghetti. I liked this lab but the rate of change definitely was not constant. Some students' data caused the slope to be 0 which created some interesting results.

We then did my modified version of Dan Meyer's hot vs. crazy. Dan was brave enough to use himself but I don't date and most of my students know me personally enough that I just didn't even go there. So I had them pick people to judge for themselves. I could say that I was trying to promote ownership of the data but I was really just trying to promote them out of my business.

We wrapped it up with this powerpoint on correlation vs. causation which I owe all to @smallesttwine.She gave me some great, random ideas to use for examples. Some of my classes had a hard time deciding how to make up a scatter plot without any data. By the end, we were discussing more than graphing, but that was okay with me, and naturally lent itself to this worksheet I stole from a Google search but can no longer find the original link to. I thought about giving a quiz but decided I had already assessed the heck out of scatter plots.

Up this week we'll be starting solving systems of equations. Any ideas?

In the geometry world, I was lucky enough to find a great wiki from @tperran which has been extremely helpful. We started a new unit on polygons and I have easily adapted his powerpoints to fit my class better. They are more creative in the practice and examples given than I have been, and I appreciate that. Here are my adaptations on polygons, parallelograms, rectangles, rhombus, and trapezoids.

Up this week we'll be talking about kites and perhaps building our own rhombicosidodecahedrons.

The End.