You can find the chalks I use there, too. They are square pastels by Sargent Art.
Inspiration for this chalk drawing came from the book Mountains and Volcanoes by Barbara Taylor.
This chalk drawing took about 20 minutes to make. Chalk drawings remain on the chalkboard for either the whole unit or for a few days to a week depending on the lessons.This drawing will be copied into the children’s main lesson book or into a geology lapbook.