Curated OER
Grouping Buttons
Looking for a good lesson on counting and sorting? This lesson is worth a look! In this classification lesson, learners sort buttons by color, shape, shiny verses not shiny, or number of holes.
Curated OER
Primary Geometry
Students identity simple geometric shapes. In this early geometry instructional activity, the teacher introduces students to triangles, squares, and rectangles, then students identify and classify the shapes as they are found in the...
Curated OER
Slides, Flips and Turns
Third graders are introduced to different types of transformations. As a class, they describe how a stuffed animal slides across the floor and use themselves to demonstrate as well. Individually, they flip and turn in different...
Curated OER
Tessellations: An Application of Simple Regular Polygons
Tenth graders identify homogeneous tessellations. In this model-based lesson, 10th graders make and identify homogeneous tessellations, both regular and semi-regular.