BA Science 4BBy Jason Batterson, Stephanie Sadrian, and Mark Eichenlaub. Illustrated by Sarah Leuver and Zachary Sterling. Design by Doa Ar. Recommended for students ages 912. Beast Academy Science 4B is the second in a two part Level 4 science series. BA Science 4B content is aligned to the Next Generation Science Standards (NGSS) for grade 4, but often goes well beyond what is typically expected of students. Science 4B includes units on the power grid, the