Metacognitive ability supports both self-regulated academic learning and effective social communication. It is critical to adolescents' ability to successfully transition from secondary education to adult contexts, underscoring the need to understand age-related changes beyond childhood. There have been conflicting findings on whether…

California's Kindergarten Readiness Act of 2010 revised the cutoff date by which children must turn five for kindergarten entry in that year and established transitional kindergarten (TK), defined as the first year of a two-year kindergarten program for all students affected by the birthdate eligibility change. Since it has been implemented across…