I apparently owe a lot to my 9th grade math teacher. Every Friday, Mr. Smith would have the class play a game. He would write a series of numbers on the board, and the goal was to use basic math to ...
Two students in Danielle Adler’s kindergarten class at Marcus Hook Elementary School in Marcus Hook, Pa., prepare for an addition problem. Credit: Holly Korbey for The Hechinger Report The Hechinger ...
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