Science SOL 4.7 Moon and Earth Matching Game Concentration Game hint open and close a box before picking another and it won't count against you. Change the size with "settings". If the clues get cut off, you can read them just under the game board. Tools See a list of terms used in these activities. Matching Concentration Activities created by: Maria Casby Allen This activity was created by a Quia Web subscriber. To learn how to make your own, just like this, click here.