Kenken puzzles for mental math and logical thinking
 
   Here's another fun idea to get a bit of mental math into the math lessons in early grades... play KenKen puzzles! (And they are really neat logical thinking puzzles for any "grade" or age - I enjoy them too!)   You can play Kenken online here  -  options include the puzzle size, operations to use, and difficulty level.   The image above shows a 5x5 solved  Kenken puzzle that uses all four operations.   You might also check the offer for free weekly KenKen puzzles that Denise mentions .  
