NCTM would like to recognize and congratulate the 101 NCTM members recently announced as recipients of the 2021-2023 Presidential Awards for Excellence in Mathematics and Science Teaching-the nation's ...

Thinking about numbers using frames of 10 can be a helpful way to learn basic number facts. The four games that can be played with this applet help to develop counting and addition skills. (This ...

Bobbie Bear is planning a vacation and wants to know how many outfits can be made using different colored shirts and pants. Click on a shirt or a pair of pants and drag it over Bobbie Bear. Release ...

This tool allows you to practice multiplying single-digit numbers. Click on any of the blue squares to show a product. Double-click on any displayed product to hide it behind a blue square again.

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Enter the number of points to be plotted. Enter the points in the input box. The graph will update as the points are entered. Click the Show Line box to show a line. Fit the line to the data by moving ...

Formative assessment is any assessment task designed to promote students' learning. These tasks give both teachers and students feedback, so that teaching and learning activities can be altered ...

The buttons are meant to be used sequentially, and will appear in the order in which they are meant to be pressed. Be sure to allow all movements to cease before pressing another button, as this will ...

A tessellation is a repeating pattern of polygons that covers a plane with no gaps or overlaps. What kind of tessellations can you make out of regular polygons? What shapes tessellate? If shapes can ...

Line segment AB is drawn in the plane. Where should point C be placed so that triangle ABC is a right triangle? so that it is an isosceles triangle? so that it is obtuse? This activity will allow you ...

Use tiles to represent variables and constants, learn how to represent and solve algebra problem. Solve equations, substitute in variable expressions, and expand and factor. Flip tiles, remove zero ...

Thinking about numbers using frames of 5 can be a helpful way to learn basic number facts. The four games that can be played with this applet help to develop counting and addition skills. (This applet ...