Fourth graders use tangram sets to investigate the congruence of shapes. They use congruent shapes to demonstrate the properties of slides, flips, and turns. They complete a math journal entry that describes and illustrates each concept.

Students grow bacteria. In this bacteria growth lesson, students allow bacteris to incubate for 2-3 days. The teacher uses a document camera to show how to remove the bacteria from the plate. Students remove a small sample of bacteria...

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...

Students read a favorite poem and create a Power Point slide show depicting a visual interpretation of the images in the poem.

Comprehensive guide with 17 areas of suggestions and tips for delivering a successful class presentation. Requires Adobe Reader. [PDF] CCSS.ELA-Literacy.CCRA.SL.4, SL.11-12.4 Presentation

This one page Mathworld site has a number of examples of semiregular tessellations. A definition and a small amount of related information is given at the bottom of the page.