What is the recommended implementation with 3rd, 4th, and 5th graders during the first year and in subsequent years?

In grades 3-5 (on-grade-level) Amplify Fractions could be used as the core curricular materials as well as a supplement to the core curriculum, whereas for grades 6-8 it's inherently a supplemental program. 

For a detailed list of implementation suggestions, visit:  https://www.amplify.com/fractions/program/#students