This is a hands-on science experiment / exploration centered on density; however, it also includes division so it ties in nicely with math. The lesson explores sink and swim, while simultaneously teaching the density of various liquids. I taught it in a 5th grade class, but it could easily be lowered to a different grade level. It includes the objectives, standards (for Florida, but I list the description, so it should be easy to find the corresponding standard in your state), materials, and