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### 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.### Factor Game

3-5, 6-8

Exercise your factoring ability against a human or the computer in this Calculation Nation game.### Fraction Game

3-5, 6-8

This applet allows students to individually practice working with relationships among fractions and ways of combining fractions.### Product Game

3-5, 6-8

This applet is the Product Game: a fun, interactive game that exercises your skill with factors and multiples.### Personal Number

3-5, 6-8

Find your personal number using your birthday! It is the month + date + year & month × date × year.