This is a 'tic tac toe" game with a DIFFERENCE. A player must answer a question to place a marker on the board. There are 40 cards with questions about the moon phases. there is an Identification Chart for students to use to check the accuracy of an opponent's play or review a particular phase.
There are many nature study and science games in my TPT store -- Word Search, Crosswords, Anagrams, Bingo, Rummy, Concentration, Sorting, Tic Tac Know, Dominoes and Board games.