One of my favorite things to teach in October is the human body. It lends itself so well to Halloween with skeletons and gross-outs, but it is completely based in science standards. We can read a lot of nonfiction that actually engages kids when we teach about the body. Here are a few of my favorite books and activities for teaching the human body.
https://www.scholastic.com/teachers/blog-posts/meghan-everette/human-body-engaging-nonfiction-and-craft-partner-lessons/