Mixed numbers can be added conceptually, algorithmically, and physically. Have the class visualize mixed numbers by adding fraction bars together. They then discover the algorithmic process that simplifies adding mixed numbers. Finally,...

Students explore the concept of adding and subtracting using positive and negative numbers. In this addition and subtraction of signed numbers lesson, students use pennies to represent positive and negative numbers. Students deposit and...

Students solve linear inequalities. In this algebra lesson, students rewrite inequalities using one and two step equations. They graph their findings and identify the slope and solution of the line.

The sky's the limit of what you create when combining functions! The module begins with a review of transformations of parent functions and then moves to combining different function types using addition, subtraction, and...

Students investigate the structure of the atom and its composition. For this atom structure lesson, students find the area of cut out circles and drop pens into the circles. They count the number of marks in the circles and relate their...

Sixth graders compare the relative sizes of the five Great Lakes and their human populations. They describe some of the problems that arise when many people depend on a limited resoure. Students discuss how the Great Lakes and the...