The co-authors say research shows learning — including for social and emotional skills — is often sequential where
foundational skills and
knowledge are mastered
before moving on, therefore it wouldn't be effective to just implement a preschool program for four - year - olds a year earlier.
Historically, school accountability systems in the United States tend to start measuring success at 3rd grade, though children begin developing critical language, literacy, and
foundational content
knowledge long
before they reach this all - important turning point.