Feel free to paint your gouache scenes on whatever surface you choose. In this course my paintings are done in sketchbooks, but you can also use boards.

The full supply list is below the video in case you missed it earlier.

Also other recommendations in this video are.

Hobby Lobby: Master Touch watercolor Canvas Panels - https://www.hobbylobby.com/art-supplies/painting-canvas-art-surfaces/watercolor-paper-boards/watercolor-blank-canvas-set---8-x-10/p/155548

crescent illustration boards: Search art stores or online.

Hahnemuhle Toned Sketchbook: https://lindaglovergooch.com/gouachesketch