Teaching Ideas: Math Games
I have been working on coming up with some simple math games for my kids to play when they are done with their work to help them master basic addition and subtraction facts.
Here are some ideas I have come up with so far:

Go Fish w/target sum
Remove all face cards from deck of cards
Each student gets 5 cards (I just chose this at random - I suppose it could be any number)
Put remaining cards in center of group all mixed up
Students lay down pairs of cards that equal the target sum (I use a sum of 10)
Play like regular "go fish" except they are looking for the card that will help them make the target sum
Missing Addends Game
3 player game (or 2 students plus teacher)
Remove all face cards from deck of cards
Put 1/2 of deck in front of each of 2 students. Each draws top card and places on their forehead without looking. Each player can see only the other player's card, not their own.
3rd player (or teacher) calls out sum of 2 cards. 1st one to guess the value of their own card is the winner.

Dice Games
I recently received a grant from the Kids In Need Foundation and used the money to purchase some "Shut the Box" games from Amazon.com very inexpensively. My kids loved practicing their addition facts using these games!

Dominoes with target sum
Select a target sum (this may depend on what type of dominoes you are using - for example, double six dominoes might need a smaller target sum than double 9, etc)
Played like regular dominoes except students must match end to end to add up to the target sum
More ideas:
http://www.mathwire.com/games/addsubgames.html
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