Yes. The materials can be shared between small groups of students. Depending on your group’s schedule, you may want to have the parents cover some of the material at home (e.g. complete the reading assignments at home and the experiments at the co-op).
Small schools can also successfully use our curriculum. The books can be shared by 2 or 3 students, and the experiment kits can also be shared. Typically, only one Instructor’s Guide is needed.