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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.