Are you into project based learning? Does your school require it?
Round out your Vitamin and Mineral lessons with a mini-project. ("mini" because it only takes one and a half 45 minute class periods.) Give your students the opportunity to demonstrate their understandings of vitamins and mineral, why the body needs them, and how they function in the body.
This mini-project has students using and applying all their new knowledge by creating a brochure for a mock multi-vitamin.
Students especially like this project because they can be creative and select their own end result. It's not book work. It's not Q and A. It's real world application that the kids can see the practicality of.
At the end of the instruction sheet is a very clear cut points based breakdown so students know exactly how they will be graded.