Tic Tac Go (negative numbers): Background Information 

Summary  In this game the player has to get three sumresults in a row, as fast as possible (horizontal, vertical or diagonal). Simple addition and subtraction will be practised. 
Subject  number, estimation 
Age Group  middle school (gr. 78)  high school (gr. 910)  vocational (gr. 78) 
Programmer  Huub Nilwik 
Author  Michiel Doorman 
Version  revised version 
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