Number
& Operations Activities from the
National Library of Virtual Manipulatives
Count Us In Games
Games to help children understand basic number concepts
A tic-tac-toe type game. Choose addition, subtraction or multiplication, then match problems to solutions to get five in a row.
Bear Addition
Help bear make 10's by plucking cubes from the river. See how many tens you can make.
Pan Balance
This double pan balance provides an interesting environment in which to consider the concept of "equivalence."
Counting Shirts & Shorts
Bobbie Bear is planning a vacation and wants to know how many outfits can be made using different colored shirts and pants.
The Factor Game
Test your factoring ability against a human or the computer.
The Product Game
A fun interactive game that exercises your skill with factors and multiples!
Fraction, Decimals & Percents
Find links to many fraction activities on the Internet.
Equivalent Fractions
Create equivalent fractions by dividing and shading squares or circles.
Playing the Fraction Track
Think about how fractions are related to a whole, compare fractional parts of a whole, and find equivalent fractions in this game for 2 players.
Fraction Bars
Exellent site for helping students visualize connections among fractions, decimals, or percents.
Comparing Fractions & Percents
Which is greater: 20% or 3/8? Use this site to visualize fractions & percents in 4 different ways: as slices of a pizza, subsets of people in a group, as a partially filled cup, or as pieces of a chocolate bar.
Comparing All Three
Can you match fractions, decimals or percentages pairs? Try it at this site!
Mathematics Glossary
Multimedia glossary of math terms developed by Harcourt Brace
