Which method is NOT mentioned as a way to achieve acceleration?

Summer enrichment programs are typically designed to enhance students' skills and knowledge in specific areas during the summer months but do not directly lead to acceleration in the academic curriculum. Acceleration refers to strategies that allow students to advance through educational content at a faster pace than the typical curriculum allows, such as skipping grades or engaging in advanced coursework while still in high school.

Grade skipping, early college graduation, and early part-time college study are all strategies that directly facilitate this acceleration by allowing students to progress more quickly through standard educational requirements or to earn college credits before completing high school. In contrast, summer enrichment programs focus on supplementary learning rather than the acceleration of the standard program of study. Thus, it makes sense that this option is the one not mentioned as a method to achieve acceleration.