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Interactive
Soft Schools

Soft Schools: Find the Missing Number Game

For Students Pre-K - 1st Standards
Students enter the missing number in a consecutive sequence of three integers. Score is kept.
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Activity
Math Is Fun

Math Is Fun: Common Number Patterns

For Students 3rd - 8th Standards
Developed by a mathematics teacher from the UK, this page identifies and illustrates several common number patterns.
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Interactive
Fun Brain

Fun Brain: Number Cracker (Number Series Game)

For Students 2nd - 5th
The Number Cracker needs you to help find a secret code by identifying the missing number in a series.