SamizdatMath

This is a set of 90 puzzles (30 at each level) of Advanced "Square Knot" Puzzles focused on practicing problems solving for 1st through 3rd graders using addition and subtraction. The format is the same as other square knot puzzles, with larger numbers. Why you should try these: One of the things that we should be emphasizing from the very earliest of ages is mathematics as problem solving. This is more than writing a bunch of word problems: problem solving is about using various techniques for

This is the fastest and easiest coin practice game you will ever image: print out the coin cards twice, cut and shuffle. Place between two partners. One card is turned over and the two partners call "salute." They each put a card on their own forehead, then add their partner's card to the one showing between them. They call out the answer, then they have to figure out what card is on their own heads based on that information. Comes in basic, hard, muy hard and mas hard!

Howdy you all! You know, one of the things I love about people who don't know much about math is that they think that there's always one right answer to a math question. Well, there isn't: the reality is that most math questions (even seemingly simple ones like "how much is 2 + 2?") have answers like "well, it depends." In the case of "how much is 2 + 2, it depends on the base system you're working in: if it was base 3, then the answer would be 11 (1 group of 3 and 1 remainder), or it it was bas