Differentiated instruction refers to adjusting a student's work to meet the needs of that learner. For example, when the teacher reads a story to the class, one student may create a picture as their response, one may write a paragraph, and one might do a combination of drawing and writing. In class you may see a student with dysgraphia typing or using a talk-to-text program as the basis of his essay. You might see a student reading independently, with an audio book, or with a tutor.
Also, our classes and groupings are flexible. A "5th grader" might do better in the elementary program, or they might do better in the middle school program. It depends on the student's academics, needs, and personality. One student may meet with a tutor a few times a week to strengthen a specific skill or enrich their education in a different way. What does your student need?