This is a Tic Tac Toe game with a DIFFERENCE -- the players must correctly identify a shell to place a mark on the board. There is an Identification Chart to help the student learn to identify the shells and learn their family name, also.
There are many nature study or science games in my TPT store --
Crossword, Word Search, Bingo, Rummy, Concentration, Sorting,
Tic Tac Know, Dominoes and Board games.