iPhone Charger

May 27, 2013March 30, 2021 by Jon Orr

Use this problem based task to generate a need to graph relationships, analyze linear relations, and extrapolation.

Act 1- Video

When will the phone charge?
1. Give an answer that is too high.
2. Give an answer that is too low.
3. Find how long it will take to charge.

Act 2 – hints
1. Make a table of values comparing the time and the percentage.
2. Graph the relation.
3. Find an equation to model this relation.

Act 3 – Video

1. What could cause the difference in answers?

3 Act Math – Ground Cover

May 1, 2013 by Jon Orr

With inspiration from Dan Meyer through Kyle Pearce, I created a Three-Act Problem. My grade 11 class just finished finding side lengths and angles in right triangles using the primary trigonometric ratios, and we’re moving on to solving problems! In the spirit of solving problems…..here is a Three Act Problem.

Ground Cover