CK-12 Foundation
Subtraction of Fractions: Fragmented Fractions
An interactive challenges scholars to subtract mixed numbers. Pupils answer questions—multiple-choice, fill in the blank, and true or false—with help from virtual fraction strips. The practice closes with a discussion.
Curated OER
Putting it On Paper
Learners locate and print samples of two different business letter formats. They write rough drafts of business letters inquiring when, where, and how math is used.
Curated OER
The 3 R's of Common Denominators (Language)
Young scholars solve various word problems that deal with common denominators, and write the mathematical explanations they used to obtain the solutions.
Curated OER
Family Cookbook
Second graders, in groups, produce a Family Cookbook by bringing recipes from home.
Curated OER
Mathematical Contributions By Women
Third graders explore the contributions of women to mathematics by writing a research paper, presenting a summary to their peers, and sharing an activity with their peers. They use a variety of reference materials to gather information...