By Jim Roope, CNN
(CNN) –Some call it "the summer slide." Some call it "the summer brain drain." Whatever you call it, summer learning loss is a real phenomenon that has plagued students since summer vacations began.
Fourth-grade teacher Marian Valdez said much of what students learned in 3rd grade they forgot over the summer.
“We spend the first couple of months, especially in math, reviewing, going back over the facts, time tests, those kinds of things,” said Valdez who teaches at Washington Elementary in Los Angeles.
The first known report about summer learning loss came in a 1906 New York Times article by William Allen. He tested students in math before and after their summer recess and found that they had lost math skills during that break. For more than a hundred years, educators have been trying to stop the summer knowledge leak.