The classic "I have... Who has..." card game. This edition is for practice with squares and square roots up to 15 squared/the square root of 225.
Print and cut out the cards. Shuffle them so that they aren't in order when dealt. Distribute one to each student until all cards are passed out. There are 27 cards, so some students may have to share cards or have two cards depending on your class size. Choose any student to start. The questions and answers will form a chain that eventually loops back around to the first student.
This game will help with the fluency of square & square root facts.