This easy Sudoku puzzle features the lowercase letters a, b, c, and d! Solve the puzzle by writing each letter only once in each row, column, and block.

Practice mixed operations with this fourth-grade math puzzle!

Add a fun twist to math practice with these second- and third-grade addition puzzles!

Addition doesn't have to be puzzling—practice finding sums with these puzzle boxes!

Addition doesn't have to be puzzling—practice finding sums with these second- and third-grade puzzle boxes!

Calling all Sudoku and Ken Ken buffs! Give your student a fun way to practice math and problem solving with these fun puzzles.

Fun Fun puzzles are almost like Ken Ken! These ones are tricky, but very fun to solve. Give your student a fun way to practice simple arithmetic.

Hey math buffs, do you need a challenge? These math puzzles are tricky, but are a fun and simpler spin-off of the Ken Ken puzzle.

Give your brain a fun workout as you complete this summery worksheet!

Put your addition skills to the test with these puzzle boxes for second and third graders!

Put your addition skills to the test with these puzzle boxes for second and third graders! 

Put your addition skills to the test with these puzzle boxes for second and third graders!

Calling all Sudoku and Ken Ken buffs! These math puzzles are tricky, but are a fun and simpler spin-off of the popular Ken Ken puzzle.

Calling all Sudoku and Ken Ken buffs! These math puzzles are tricky, but are a fun and simpler spin-off of the Ken Ken puzzle.

Math maniacs, these challenging puzzles are for you! These four puzzles are tricky, but are a fun and simpler spin-off of the Ken Ken puzzle.

Is your child a math whiz who needs a challenge? These math puzzles are tricky, but are a fun and simpler spin-off of the Ken Ken puzzle.

This is for all you math whizzes who need a challenge! These math puzzles are tricky, but are a fun and simpler spin-off of the Ken Ken puzzle.

If your child is mad for math, give him a challenge! These math puzzles are tricky, but are a fun and simpler spin-off of the Ken Ken puzzle.

Shape up those problem solving skills with a fun block puzzle activity, comparable to tangram puzzles!

Strengthen students' logic and critical thinking skills with this engaging logic puzzle!

Figure out the results of an Easter egg hunt in this fun logic puzzle for upper elementary students!

Gather your supplies for the start of the school year with this sudoku for first, second, and third graders!

Solve a sunny, summery sudoku puzzle in this sandcastle-themed puzzle!

Embrace Earth Day with this classic number puzzle for third through fifth graders!

Boots, sneakers, flip-flops, slippers—which new shoes did Maria get? Solve this puzzle to find out!

Solve a sweet sudoku puzzle in this Valentine’s Day-themed worksheet for first and second graders!

Put your addition skills to the test with these puzzle boxes for second and third graders!

Solve the mystery of who's who in this puzzle full of spooky, cute, and creative Halloween costumes!