Students identify what materials make up compost. In this science of recycling lesson, students explain the benefits of composting determine how compost is a good plant fertilizer.

Students study how to forecast sea conditions.  In this oceanography instructional activity students complete a class activity on wave making. 

Find both the center and the scale factor of a dilation that maps a given figure to another one. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.