All of my students, K-3 have a science notebook. When they fill one up, they get a new one. These are theirs to keep for reference and resources. We glue in any lab sheets (they are taught how to fold them and only glue one half of the paper so they can still open it and it does not stick out), foldables, leaves, different types of sand, soil, clay particles, etc. I also have small ziploc (snack size or smaller) bags, so they can put liquids, slime, etc in their notebook also. In the first few weeks of school, I pass out old science magazines, national geographic kids, or whatever I have on hand. They get to cut out pictures of what science means to them and make a collage on the front on their notebook. I then cover in it in clear contact paper or clear packing tape. They are so proud of their notebooks and show any guests who come in! Their favorite part is taping things in. I go through a lot of tape, but it is worth it. :) Every table has their own dispenser. I always start off with modeling my own notebook. Anytime I go to any science prefessional development or I am trying out a new experiment/investigation, it is logged in my notebook. We have tried binders, folders, spirals, and the best thing is the compostion notebook. Consider using science notebooks...it improves science inquiry skills and writing.
I am an elementary science STEM lab teacher in Florida. I teach primarily K-3. Before teaching science, I taught K (where my heart is), ESE pre-k, and ESE Resource K-5. I am ESE, ESOL, and Gifted certified/ endorsed K-6. This is my second career and my passion! I love teaching. :)