This might be the product you're looking for to review the rules of exponents. Included are the product rule, the quotient rule, negative exponents, positive exponents, zero exponents and raising a exponential term to another exponent.
There are 16 squares that must be connected to make a larger square. Two puzzles (one with no border answers and one with border answers can have the four corner pieces switched to create an easier or harder puzzle).
1. One puzzle would have answers on every edge of every piece.
2. One puzzle would have not answers or questions along the outside edges of the puzzle.
3. Replace the four corners only of the puzzle 1 and leave all the other pieces in place. This will make it easier for students to locate the four corners.
4. Replace the 8 outside middle pieces from puzzle 1 with the 8 outside middle pieces of puzzle 2. This will make it easier than puzzle 1.
Since the two 16 piece puzzles have the same questions you can make these switches between the two puzzles to differentiate the lesson.