Use this tag to discuss techniques for differentiated instruction. This is NOT the calculus concept of differentiation.
Differentiated instruction involves a student-centered approach to the classroom. Wikipedia provides a good starting definition for it:
Differentiated instruction and assessment (also known as differentiated learning or, in education, simply, differentiation) is a framework or philosophy for effective teaching that involves providing different students with different avenues to learning (often in the same classroom) in terms of: acquiring content; processing, constructing, or making sense of ideas; and developing teaching materials and assessment measures so that all students within a classroom can learn effectively, regardless of differences in ability.