Lesson Plan
Howard County Schools

Constant Rate Exploration

For Teachers 9th - 11th Standards
Question: What do rectangles and bathtub volume have in common? Answer: Linear equations. Learn how to identify situations that have constant rates by examining two different situations, one proportional and one not proportional.
Unit Plan
CK-12 Foundation

Ck 12: Statistics: Double Line Graphs

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] Construct and interpret double line graphs.
Lesson Plan
Better Lesson

Better Lesson: The Double Number Line

For Teachers 6th Standards
The double number line will help students figure out problems that involve two quantities.