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TenFrame
Number and Operations

Ten Frame

Pre-K-2
The four games that can be played with this applet help to develop counting and addition skills.
HowManyUnderTheShell
Number and Operations

How Many Under the Shell?

Pre-K-2
Use this tool to practice addition and subtraction with Okta, the octopus.
PrimaryKrypto
Number and Operations

Primary Krypto

Pre-K-2, 3-5, 6-8
Combine five number cards using the four arithmetic operations (+, –, ×, ÷) to arrive at a "target" number.
PatchTool
Geometry

Patch Tool

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

Shape Tool

Pre-K-2, 3-5, 6-8
This tool allows you to create any geometric shape imaginable. Squares, triangles, rhombi, trapezoids and hexagons can be created, colored, enlarged, shrunk, rotated, reflected, sliced, and glued together.
ElectronicAbacus
Number and Operations

Electronic Abacus

Pre-K-2, 3-5
This applet explores the use of an abacus model for representing numbers and for performing addition.
Ken Ken 150
Algebra

KenKen

Pre-K-2, 3-5, 6-8, 9-12
Developing Calculation Skills, Logical Thinking and Persistence with a Puzzle Game
TimesTable
Number and Operations

Times Table

Pre-K-2, 3-5
This tool allows you to practice multiplying single-digit numbers.
ShapeCutter
Geometry

Shape Cutter

Pre-K-2, 3-5, 6-8, 9-12
With this tool, you can explore how to decompose shapes and recompose them to make other shapes. You can draw and cut shapes and also use slides, turns, and flips to move pieces around.
eEx_4.1.2 ICON
Algebra

4.1.2 Describing Patterns

Pre-K-2

Give examples of various ways students might interpret the same sequence of cubes.