One of my favorite art lessons that was always a hit was my Day of the Dead skull design. Students loved it since it incorporated Hispanic heritage of some students and others loved it because drawing skulls was encouraged! I have had a lot of success with this lesson with a wide variety of age groups as well from late elementary to early high school with minor modifications.
This lesson incorporates history since students learn about the Day of the Dead from information packets included in the lesson and math since their skull is symmetrically balanced.
The lesson includes written and illustrated directions and gives alternatives for different materials so it can have a wide degree of difficulty. I've also found that students who have a lot of experience with art spend time making complicated skull designs while students that are just starting still have success with basic skull shapes.
Check it out in my shop if you're interested!