The Magic School Bus Plants Seeds: A Book About How Living Things Grow

The Magic School Bus Plants Seeds: A Book About How Living Things Grow by Joanna Cole, illustrated by John Speirs and Bruce Degen

The magic school bus goes small to hang with the bugs and nectar as plants are pollinated and seeds produced. As a twist, they go back to Phoebe's old school and even see her old teacher. (Thus when she talks about her old school, they respond that they are there.)