Here is a great puzzle link http://www.kenken.com/ These puzzles are a Sudoku type with a twist instead of just making sure the numbers from 1-9 are in each column or row, these must add, subtract, divide or multiply to specific (given) numbers. Teachers can sign up for a free email every 2 weeks and receive the puzzles (and answers ) ready to go!
Happy Ken Ken-ing, C
This is really good I haven’t seen a ken ken before so much fun