A plethora of research has shown that students lose an average of 2 months of academic skills over the summer months. As a result, teachers are compelled to review the previous year's work before teaching new material in the first few weeks of school. This loss of educational gains is commonly called the "summer slide".
According to many educational sources, the disparity of loss between students living in poverty and those from more affluent families is great. Students living in poverty often experience more than 2 months of educational loss, while students from affluent families may make slight gains. While the reasons for the disparity may be varied, one contributing factor may be unequal access to quality summer programming.
While physical and social activities are imperative to a child's overall health and well-being for summer, building upon the foundations set throughout the academic year are just as vital. Remember that READING EVERY DAY is a key factor in preventing a loss of students' educational gains.
http://www.childmind.org/en/posts/articles/2012-7-16-summer-slide-keep-kids-reading Source: Child Mind Institute