Curated OER
Cutting Sandwiches
Students discuss shapes and their characteristics. As a class, they explore shapes made from a square. Students explore triangles, squares, fractions of a square such as a half and a quarter. Individually, they complete worksheets, and...
Curated OER
Standard Sizes of Paper
Students measure the dimensions of different sizes of paper. Using a copy machine, they discover dilations. After enlarging and shrinking particular copies, students examine rates, ratios and percentages and discover the relationship of...
Curated OER
Standard Envelope Sizes
Students measure the length and width of various sizes of envelopes. After comparing the envelopes, they explore the ratios, percentages, and rates. Students discuss postal rates and compare the cost of mailing items, delivery times, and...