Second graders solve change unknown story problems using a number line. This lesson gives students a new strategy to attach change unknown word problems.

This sample chapter from Hurst's book Picturing Math is an excellent resource for using picture books and activities for learning computation.

What good fishing trip isn't without a good story or two? Today the students will solve comparison story problems involving different lengths of fish.

A lesson plan based on the story, "Oliver's Fruit Salad," where students explore the concept of proportional reasoning through modeling, student sharing, and questioning. A great introductory lesson plan for this concept that is sure to...