A fifth-grade teacher has a class of students at varied levels... How can the teacher differentiate science instruction for students working above grade-level?"
What strategy can a fifth-grade teacher use to differentiate science instruction for students working above grade-level?

a. Ignore the needs of high-achieving students
b. Assign extra homework unrelated to the topic
c. Provide advanced materials and challenges
d. Focus on a one-size-fits-all approach