[Free Registration/Login may be required to access all resource tools.] The video lesson explains the relationship between repeated addition and multiplication. The video is followed by a series of practice questions to assess student...

This lesson focuses on the Monty Hall game where you select one of three doors. It explains your odds based on your choices.

This is a brief explanation of the order of operations that includes some simple examples. It also has directions for dealing with parentheses and exponents.

This lesson plan provides students with an opportunity to practice drawing and measuring triangles and angles. It also shows pictures and gives definitions of each type of angle and triangle.

Create a creature that uses air to create motion with this challenge. Site includes tips, lesson plans, and a place for students to document their design process.

Using cardboard, popsicle sticks, rubber bands, and strings create a pine cone that opens and closes. This site contains lesson plans, tips, and a place for students to document their engineering design process.

Build a zoetrope machine where you can animate a facial expression and the machine plays the animation back with this site. Site contains lesson plans, tips, and a place to document your design process.

Using common household materials students are challenged to make a flying raptor and control its flight with attached strings. Site includes lesson plans, tips, and a place for students to document their process.

For this lesson, students will sing the song There Was an Old Lady to learn about the topic of probability. Using a spinner with the lyrics from the song, students will play a game and record the number of times each topic from the song...

A lesson, practice activity, and teacher resource for exploring combinations using six photographs of dogs.