After yesterday's lesson I realized that I need to spend more time with Andrew on his understanding of radians. I drew a circle on the board on a coordinate plane. Then I asked Andrew if rotating around the circle clockwise, how many degrees would we have moved here, here, here, etc. He named 0, 90, 180, 270, and 360. Then I showed him how 2Pi is 360 degrees. So then Pi would be 180 degrees. We used this concept to label Pi/2 and 3Pi/2. Then I asked Andrew how to find 225 degrees in radians. He set up and solved a proportion. Tomorrow, I will go back to the lesson on how to use the arc length formula.