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.

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

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!