Edith Hamilton is the classicist's classic. Her Mythology book was a favorite of mine as a child. It reads like short stories and works well for kids who want a deeper understanding of Greek mythology. For ages 9 and up.
In this FREE research assignment students research different gods, goddesses, creatures and humans from Greek Mythology. I had my students work individually at home and I had them pick names from a hat. You can have them work in groups and do it in class using laptops if you wish. Some of my students prepared PowerPoint presentations, some made posters and others just made a speech. The CCSS for grades 6-12 are included.