Estimate!
Objective: SWBAT estimate the rate of change of a function from a graph.
Big Idea: Just like estimating the number of jelly beans in a jar, your students estimate the rate of change for graphs with the best estimate winning the prize!
Print Lesson
Put It Into Action
Instead of just having my students work independently as they practice estimating rates of change, I create a classroom friendly competition which encourages student engagement. I tell my students that they will each need a white board, marker, and eraser to write and share answers. I distribute the Estimate handout (except for the final page with all the equations and rates of change!) and review the rules of the game.
- Each student should make their best estimate for the rate of change for each graph, for the section between x=1 and x=2, writing it on their whiteboard.
- When a reasonable time has passed (anywhere from 30 seconds to 2 minutes) I will call time at which point everyone must display their whiteboard simultaneously.
- The student(s) with the best estimate wins a point for the problem. Ties each win a point.
- Students may challenge any decision but must support their challenge claim mathematically.
I ask if there are any questions, then begin the game, with each student working to estimate each rate of change. (MP1)
Wrap It Up
I close this lesson by giving each student a notecard and asking them to write three strategies/tips, that they would give to an absent classmate, for estimating rate of change accurately. (MP2, MP6)
If you needed to provide your class with more specific directions, you might have your students answer the following questions:
- What is one important thing you would share with an absent classmate about today's lesson and why do you think it's important?
- Describe one strategy you used to estimate the rate of change for a data table.
- Describe one strategy you used to estimate the rate of change for an equation.
