National Council of Teachers of Mathematics13d
2025 Kansas City Spring Conference Highlights
Thank you to all who attended the NCTM 2025 Spring Conference in Kansas City! A special thanks to our program committee, ...
National Council of Teachers of Mathematics5d
Pan Balance – Shapes
Build up to algebraic thinking by exploring this balance tool using shapes of unknown weight. Challenge yourself to find the weight of each shape in one of six built-in sets or a random set. Two other ...
National Council of Teachers of Mathematics7d
Factor Game
The Factor Game applet was adapted with permission and guidance from "Prime Time: Factors and Multiples," Connected Mathematics Project, G. Lappan, J. Fey, W ...
National Council of Teachers of Mathematics11d
Lessons and Legacies
Did you know that for over 2,000 years people believed that no proof could be developed for the Pythagorean Theorem using trigonometry? In his book The Pythagorean Proposition (1968), mathematician ...
National Council of Teachers of Mathematics12d
Select Common Core
Building Sets of 13 and 14 Lesson PreK to 2nd Building Sets of 15 and 16 Lesson PreK to 2nd Building Sets of 17 and 18 Lesson PreK to 2nd Building Sets of 19 and 20 Lesson PreK to 2nd Building Sets of ...
National Council of Teachers of Mathematics6y
Line of Best Fit
This activity allows the user to enter a set of data, plot the data on a coordinate grid, and determine the equation for a line of best fit.
National Council of Teachers of Mathematics8y
Curriculum Materials Matter: Evaluating the Evaluation Process
Adoption of curriculum materials is one of the most important decisions a teacher, school, or district can make. While state standards describe what students are expected to learn and be able to do, ...
National Council of Teachers of Mathematics4y
Principles to Actions Professional Learning Toolkit
These grade-band specific professional learning modules are focused on the Effective Teaching Practices and Guiding Principles from Principles to Actions: Ensuring Mathematical Success for All.
National Council of Teachers of Mathematics6y
Tessellation Creator
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 ...
National Council of Teachers of Mathematics6y
Algebra Tiles
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 ...
National Council of Teachers of Mathematics4y
Five Frame
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 ...