Movies: How did they do that?

Are two angles enough? Given two triangles, the class determines through the definition of similarity and transformations whether the two triangles are similar. Provided with pairs of triangles and measurements, small groups find out...

Flip, turn, and slide to get there. With the aid of hands-on materials, pairs transform a figure from one place on the coordinate plane to another. They determine a sequence that will move one figure to another and present different...

Math or life science learners use a TI graphing calculator to create scatter plots of data comparing body weight to blood volume. Questions are answered on the included worksheet about the data. Colorful how-to cards walk learners...

Young mathematicians identify different cases of intersecting secant lines. They then investigate the case where secant lines meet inside a circle.

Teach your class that math really can help solve real-world problems. A variety of activities shows learners that they can apply the concept of writing equations and inequalities in everyday life. The instructional activity begins with a...

Your eighth grade learners are asked to analyze and graph linear data collected by fifth graders in order to prepare a report of recommendations on the length of shoe laces for shoe manufacturers. Given the bivariate data, learners...

Why does the equal sign look that way? The resource explains the reason several of the math symbols look the way they do. Using a few specific examples, the video points out that some symbols are rooted in their meanings and others are...

A source that includes a graph may not always be the best reliable. A short resource highlights how graphs and charts can be misleading. Learners view actual graphs and note the way the graph is distorted to make a point. 

Float like a butterfly, think like a bee! Build a huge hive, hexagonally! Find out the reason that hexagons are the most efficient storage shape for the honeybees' honeycombs. This neat little video would be a sweet addition to your life...

Is it a coincidence that fingers are called digits? Did you know that one finger can represent one digit or even six parts? Watch a somewhat confusing video that explains the possibilities of counting to numbers higher than 10 on your...