I was online looking for independent/dependant variable lesson/practice for students and came across this excellent site. The teacher has posted PowerPoint lessons and activity sheets that can easily be modified for incorporation into science notebooks. I saved quite a few and plan to cut and paste what I think will work with my groups this year both for the notebooks and for quizzes.
Not looking for variable information? I still encourage you to check it out because she has PowerPoints from "What Is a Scientist?" to using the metric system.