In The Atlantic's ongoing debate about how to teach writing in schools, Robert Pondiscio wrote an eye-opening piece called "How Self-Expression Damaged My Students." In it, he tells of how he used ...

In algebra, letters are used to stand for values that can change (variables) or for values that aren’t known (unknowns). A term is a number or letter on its own, or numbers and letters multiplied ...

In algebra, letters are used to stand for values that can change (variables) or for values that are not known (unknowns). A term is a number or letter on its own, or numbers and letters multiplied ...