Fidgets can help some kids with ADHD focus better. They're not "one size fits all," however. Different types of fidgets can meet different sensory needs. You can see which work best for your child, and then talk to the teacher about using them in class.
Animal, Plant, and Prokaryote Cell Diagrams for coloring and labeling! These are fantastic for comparing different types of cells. Each diagram prints and copies well; I love how each organelle is easy to identify.