Continue to build on your students' understanding of unlike denominators by asking students to justify their answers of fraction subtraction. Use this lesson with the Subtracting Fractions with Different Denominators lesson.

Area models are building blocks to more complicated multiplication and division. Use this lesson to refresh students on the relationship between multiplication and area to prepare them to use the area models strategy with larger numbers.

Windmills have been around for generations to grind food and create energy. During this challenge, students will use various materials and put their engineering skills to work by creating their own windmills.

Have your students evaluate orally and in writing what happens to expressions when there are two or more operations. Use this lesson as a standalone lesson or as support to the lesson Express Yourself.

Sentences can be surprisingly complex. Enhance your students' reading and writing skills with this comprehensive lesson on diagramming sentences and identifying parts of speech.