This digital, self-checking tic tac toe game is an excellent alternative to a worksheet. Students will practice adding proper fractions with like and unlike denominators. If a student gets a question correct, he will place his mark, either X or O, on the 3x3 grid. The student who succeeds in getting three of their marks in a diagonal, horizontal, or vertical row is the winner. There are eight games in total. An answer key is included. Format is Google Sheets.