This The Science of Snowflakes lesson plan also includes:
There are eight activity sheets for a lesson on the states of matter and crystal formation. Not all of them are valuable. Some even require snow to be falling outdoors! Perhaps the best this resource has to offer an activity in which learners grow borate crystals from a solution and another in which they vary the amounts of material as an experiment. Pick and choose what works for teaching upper elementary classes about matter, snowflakes, crystal formation, or the scientific method.