Students can use this game to practice addition and subtraction of integers. The goal is to get three chips in a row: horizontally, vertically, or diagonally. The program itself uses many broadcasts, variables, and mathematical operations. Different parts of the program can be disected to highlight various features. The basic operation of the dice can be featured using random numbers, click and drag, and mathematical operations. The use of lists is introduced to model the 5x5 grid. An advanced task in this program is using a variable to check all the items in a list for a certain value. The students can see a finite loop to check the elements in the list. If the item is already occupied by a chip, the list identifies a number in the list that represents occupied and displays a message warning you that the square is already taken. If it is an open square, the chip is stamped onto the grid.
