1. Desmos

• Website: https://www.desmos.com

• Best for: Graphing functions, geometry, and sliders for parameter manipulation.

• Features:

  • Interactive graphing calculator.

  • Custom activity builder for teachers.

  • Dynamic sliders to explore algebra, calculus, and trigonometry.

2. GeoGebra

• Website: https://www.geogebra.org

• Best for: Geometry, algebra, statistics, and calculus.

• Features:

  • Interactive geometry editor.

  • Graphing calculator and CAS (computer algebra system).

  • Spreadsheet and probability tools.

  • Widget embedding support for websites and LMSs.

3. Mathigon (Polypad)

• Website: https://mathigon.org/polypad

• Best for: K–12 visual and exploratory math.

• Features:

  • Virtual manipulatives: algebra tiles, tangrams, number lines, etc.

  • Interactive lessons with storytelling.

  • Customizable canvas for math exploration.

4. Wolfram Alpha Widgets

• Website: https://developer.wolframalpha.com/widgets/

• Best for: Higher-level math and computation.

• Features:

  • Ready-made widgets for plotting, solving equations, statistics, etc.

  • Custom widget builder with embedding support.

  • Step-by-step problem solving.

5. PhET Interactive Simulations (Math)

• Website: https://phet.colorado.edu/en/simulations/category/math

• Best for: Conceptual understanding through real-world simulations.

• Features:

  • Engaging simulations for ratios, fractions, area, graphing lines, and more.

  • Ideal for middle and high school math.

  • Free and open-source.

6. Toy Theater (Math Manipulatives)

• Website: https://toytheater.com/category/teacher-tools/math-manipulatives/

• Best for: Elementary math exploration.

• Features:

  • Interactive tools like abacuses, base ten blocks, clocks, and number lines.

  • No sign-in required.

  • Kid-friendly visuals and interface.

7. NRICH Interactive Resources

• Website: https://nrich.maths.org

• Best for: Problem-solving and mathematical thinking.

• Features:

  • Interactive puzzles, games, and challenges.

  • Emphasis on reasoning and strategy.

  • Resources sorted by age and difficulty.

8. Tinkercad with Math Connections

• Website: https://www.tinkercad.com

• Best for: 3D geometry, design, and spatial reasoning.

• Features:

  • Interactive modeling with a math integration angle.

  • Great for exploring volume, surface area, and transformations.

  • Classroom support tools available.