Two high school classroom situations illustrate how routinely promoting the two practices of experimenting and describing in increasingly precise language can support students’ modeling.

For effective implementation in the classroom, this author uses technological, pedagogical, and content knowledge along with Pólya’s four-step problem-solving approach.

This discovery-based lesson is designed to provide students with opportunities for active engagement and productive struggle as they construct angles and formulate a rich conception of the radian.

Help students learn to think more effectively, record their ideas in a systematic way, and listen to their own thoughts.

Through the use of an online homework platform and embedded homework help videos, second-year algebra students learn to persevere in completing homework assignments.