Powerpoint to explain orthographic projection, followed by isometric projection. Example tasks where students are required to produce an orthographic projection drawing from an isometric projection drawing and vice versa.
Use the 2D Design Tools file to laser cut from card the components required to make the five types of linkages. Students fix components together using paper fasteners, then mount their work on the accompanying worksheet which they complete to consolidate their knowledge. Students will be able to see the linkages functioning.