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IGDDroppingAPerpendicular
Geometry

IGD: Dropping a Perpendicular Line

9-12
Use this applet to show how to drop a perpendicular from a point onto a line.
PatchTool
Geometry

Patch Tool

Pre-K-2, 3-5
Use this tool to design a pattern using geometric shapes.
AreaOfTrapezoids
Geometry

Area of Trapezoids

6-8
Investigate how changes in the base and height of a trapezoid affect its area.
AreaOfParallelograms
Geometry

Area of Parallelograms

6-8
This applet shows the relationship between the area of a parallelogram and the lengths of its sides.
ProductGame
Number and Operations

Product Game

3-5, 6-8
This applet is the Product Game: a fun, interactive game that exercises your skill with factors and multiples.
IGDAreaOfARectangle
Geometry

IGD: Area of a Rectangle

3-5, 6-8
Use this tool to show how the side lengths of a rectangle affect the rectangle's area.
TriangleClassification
Geometry

Triangle Classification

9-12
Use this applet to show how the placement of the third vertex of a triangle affects the classification of that triangle.

Investigating Functions with a Ferris Wheel: Distance vs. Width

Investigating Functions with a Ferris Wheel: Distance vs. Width A Web Sketchpad activity helps students make sense of relationships between quantities, in this case the way that the distance a car travels around a Ferris wheel covaries with its "width" or horizontal distance from the center of the Ferris wheel

Investigating Functions with a Ferris Wheel: Distance vs. Height

Investigating Functions with a Ferris Wheel: Distance vs. Height A Web Sketchpad activity helps students make sense of relationships between quantities, in this case the way that the distance a car travels around a Ferris wheel covaries with its height. <iframe src="/tools/ferriswheel/FerrisWheel_

NameLetters
Algebra

Name Letters

3-5, 6-8, 9-12
Use this activity to practice solving systems of equations. Use this tool to check students' answers.
eEx_5.1 ICON
Number and Operations

5.1 Playing Fraction Track

3-5
Take timed turns racing to the end of each fraction line by moving one or more of your markers to sum to a given fraction value.
SimsonLine ICON
Geometry

Simson Line

9-12
This applet allows for the construction and exploration of the Simson Line.
EulersLine ICON
Geometry

Euler's Line

9-12
Discover and explore Euler's Line.
DiagonalsToQuadrilaterals
Geometry

Diagonals to Quadrilaterals

9-12
This activity allows you to discover what types of quadrilaterals can be formed when the diagonals meet in various ways.
DiagonalsToQuadrilaterals ICON
Geometry

Diagonals to Quadrilaterals

9-12
This interactive allows users to investigate three types of quadrilaterals; ones with: perpendicular bisectors, congruent perpendicular bisectors, and congruent bisectors.
AngleBisector ICONn
Geometry

Angle Bisector

9-12

This interactive demonstrates how to bisect an angle.

PythagoreanReview ICON
Geometry

Pythagorean Review

6-8

Review and explore the Pythagorean Theorem.

 

eEx_6.5 ICON
Geometry

6.5 Understanding the Pythagorean Relationship

6-8
Provide a proof without words for the Pythagorean Theorem.
ProofWithoutWordsPythagoreanTheorem
Geometry

Proof Without Words: Pythagorean Theorem

6-8
This applet proves the Pythagorean Theorem "without words" using geometry.