A vast number of lesson plans, practice problems, and other resources for teaching elementary-school math are available. But when Maria H. Andersen is teaching future teachers, she says, they often do ...

The Library of Congress has recently digitized a group of puzzle maps dating from the late 18 th to the early 20 th century. These “dissected maps” were the first generation of jigsaw puzzles; ...

Most of us have played with Google Maps, whether it be trying to spot our back garden on the satellite view or getting directions to obscure destinations. But how would you use it to teach a maths ...