According to a newsletter from the Harvard Graduate School of Education(2) on average, students lose 2.6 months of learning in math during summer break. They also note that math learning loss is bigger than reading and cuts across all socioecnomic backgrounds. They suggest that while reading activities are often part of a family's daily life, parents and kids don't usually think about math outside the classroom (try imagining a bedtime math routine rather than a reading routine).
I am hopeful that the interactive pages in the Intentional Toolkit will give children an opportunity to brush up on math concepts that were taught during the school year. Here's to a great summer...Now go out there and be GREAT!