In this meta-analysis, I have reviewed published and unpublished research on single-track, year-round education's effect on science and social studies achievement, 2001-2016. Of 30 studies that met inclusion criteria and had data from which an effect size estimate could be calculated, 7 reported science outcomes (18 effect size estimates) or…

This study found that students in settings with a year-round calendar statistically outperformed students with traditional calendars in a school-within-a-school setting in mathematics. The study included reading and math achievement of fifth graders in three school-within-a-school year-round elementary schools. Overall, the study made 16…