To study spiders at home school, we did a spider-themed craft project, read a few scientific and fictional books on spiders and did some spider math with preschoolers.
First of all, we read the Magic School Bus Spins a Web ( Book about Spiders)
Then, the kids had to isolate the important facts about spiders. I wrote these facts on a paper plate. We then cut the edges of the plates in a sunshine-like pattern. The cuts were about 1/2 inch long. Using black yarn, the kids made spider webs. They had to wrap the yarn around the plates, threading the yarn through the slits. This was surprisingly hard even for my 6 year old! This craft is wonderful for fine motor skill development.
Then the kids drew some spiders inside the plates.
My preschoolers did some spider arithmetics, too.
Then we went outside to look at some spider webs with a magnifying glass.
Then we read the following books: