## Search Results

### Algebra Tiles

6-8, 9-12
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.

### 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.

### Deep Sea Duel

3-5, 6-8
This strategy game requires you to select cards with a specified sum before your opponent (also available on iOS and Android).

### 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.

### Factorize

3-5, 6-8
Dividing Numbers into Two Factors and Building Arrays to Represent Each Factorization

### Fraction Models

3-5, 6-8
Explore different representations for fractions including improper fractions, mixed numbers, decimals, and percentages. Additionally, there are length, area, region, and set models.

### 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).

### Pan Balance – Expressions

3-5, 6-8, 9-12
Using this interactive tool, you can practice arithmetic and algebraic skills, and investigate the important concept of equivalence.