Math Machine Games has more than 50 online math games for students from Early Elementary to Grade 12 !!

Building Sandcastles
Math Skills: shape recognition (Grades Pre-K-K)

Perfectly Symmetrical
Math Skills: plotting points with x and y axes; symmetry (Grades 4-8)
Mission: Magnetite
Math Skills: understanding relationships between percents, fractions, and pictures (Grades 3-5)


Time Travelin' Math Skills: telling time (Grades 2-4)

Power Football
Math Skills: addition; subtraction; multiplication; division; computation with decimals (Grades 4-8)
Traffic Jam
Math Skills: problem solving; logic (Grades K-12)
Jumping Math Cats
Math Skills: problem solving (Grades 4-12)
Counting Money
Math Skills: counting with money (Grades 1-2)
Disguise Combos
Math Skills: data analysis; probability; problem solving (Grades 2-5)
Measure It!
Math Skills: using rulers to measure centimeters and inches (Grades 1-6)
Penguin Waiter
Math skills: calculation with percentages and money (Grades 4-12)

Mathteroids
Math Skills: multiples (Grades 3-6)
Multiplication Mystery
Math Skills: identifying factors; multiplication (Grades 3-5)
Guess a Number!
Math Skills: number sense; problem solving (Grades K-12)
Logic Zoo
Math Skills: sorting; finding attributes; using Venn diagrams; problem solving; logic (Grades 2-5)

Da' Numba
Math Skills: addition (Grades 1-12)
Reversi
Math Skills: strategy; logic; problem solving (Grades 1-12)
Cookie Dough
Math Skills: spelling number words; converting number words to digits; place value (Grades K-5)
Tangram Game
Math Skills: recognizing and manipulating shapes; problem solving (Grades K-6)
Star Gazing
Math Skills: angle measurement (Grades 2-6)

The Crazy Pattern Machine
Math Skills: completing patterns (Grades K-3)
Buggin' Out
Math Skills: problem solving (Grades 1-4)
Math Frozen Bubble
Math Skills: matching patterns; addition; odd and even; multiples (Grades K-12)
Operation Order
Math Skills: order of operations; addition; subtraction; multiplication; division (Grades 6-10)
Multiplication Mystery
Math Skills: identifying factors; multiplication (Grades 3-5)

Send in the Trolls
Math Skills: data analysis; probability (Grades 2-6)
Long Line o' Math Cats
Math Skills: addition; subtraction; multiplication; division; problem solving (Grades 5-12)
Math Splat
Math Skills: addition and subtraction with fractions and mixed numerals (Grades 4-6)
Disaster Math
Math Skills: interpreting and solving word problems (Grades 5-8)
Reaction Math
Math Skills: addition; subtraction; multiplication (Grades 1-12)