Studies also show that the magnitude of summer learning loss varies significantly by grade level, subject matter, and family income. Most importantly, research identifies the cumulative effect of summer learning differences as a primary cause of widening in-school achievement gaps between students by family income.
A recent study by Harris Cooper, professor of psychological sciences at the University of Missouri, estimates that summer loss for all students equals about one month on a grade-level equivalent scale.
Summer Loss in Mathematics-
On average, all students regardless of socio-economic status, lose approximately 2.6 months of grade level equivalency in mathematical computation over the summer months. Researchers speculate that summer learning losses in mathematics are similar among lower and middle-income students because all students are less likely to practice math skills outside the formal classroom setting.
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