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### Coin Box

Pre-K-2, 3-5

Learn how to count, collect, exchange, and make change for coins by manipulating coins using an array representation.### Dynamic Paper

Pre-K-2, 3-5, 6-8, 9-12

Need a pentagonal pyramid that's six inches tall? Or a number line that goes from ‑18 to 32 by 5's? You can create all those things and more! Place the images you want, then export it as a PDF or as a JPG image.

### Geometric Solids

Pre-K-2, 3-5, 6-8, 9-12

This tool allows you to manipulate various geometric solids and investigate their properties.### Grouping and Grazing

Pre-K-2

Help the alien spaceship move cows into corrals by counting, adding, and
subtracting. This activity helps children learn grouping, tally marks,
and place value.### Okta's Rescue

Pre-K-2

Practice counting and subitizing by playing this game (also available on iOS and Android).

### Turtle Pond

Pre-K-2, 3-5, 6-8

Estimate length and angle measure while guiding a turtle to a pond using computer commands.### Adjustable Spinner

Pre-K-2, 3-5, 6-8, 9-12

Use this tool to create a spinner to examine experimental and theoretical outcomes.### Bobbie Bear

Pre-K-2, 3-5

Use counting strategies to make outfits for Bobbie Bear with different colored shirts and pants.

Click here to play Bobbie Bear in Spanish.

### Five Frame

Pre-K-2

The four games that can be played with
this applet help to develop counting and addition skills.