This document summarizes several studies on differentiated instruction. It finds that differentiated instruction improves student performance when implemented systematically. Teachers perceive it as effective but also time-consuming. Studies show differentiated instruction based on learning styles and using various strategies like flexible grouping and tiered lessons leads to higher academic achievement, especially in subjects like mathematics, science, and social studies. While teachers understand differentiated instruction, they need more training and resources to implement it effectively. Overall, the literature establishes that differentiated instruction promotes equity and quality in education when used appropriately in mixed-ability classrooms.