Here's a drawing project that could be great for relaxation and expression, especially for teens!
Wayne Thiebaud Candy Compositions Concepts: Composition, Acrylic Painting, Color Theory. Could try with pastels maybe?
Llama Drawing Project // www.smallhandsbigart.com
mixed media still life Pears! Good media introduction! need to use at least 1 alternative shading method (cross hatching...) and colored pencils?
Roll a Dice Landscape Drawing Game for Kids More
Simon Birch... Figure drawing project? Show movement of figure in 3 overlapping drawings
Easy drawing project for kids or for you if you want to make your own easy coloring page. This is fun stuff.
Bryony Houldsworth: Year 1- Experimental Drawing Project. Love the idea of something new and different like wood! At my old high school we could only paint on canvas/illustration board
Positive Negative Space Study - RISD Pre-College on Behance
A Bug's Life... Great and fun simple drawing project! Sub lesson idea.