Students may need help with the 5th grade Brain Teaser, which asks for orthographic drawings (but does not introduce the term). Here is a separate lesson you can provide as a supplement to MPACT to help students get a solid grasp on orthographic drawings (or projections).
Scott Kim, puzzle master, has created lovely activities for exploring symmetry, math, and art. Several activities are appropriate for MPACT students. Great animations provide easy access to complicated activities. Classroom-ready materials.
For you to choose what is best for your students:
This open-source unit from Open Up Resources is all about scale drawings. You can choose lessons to supplement Modifying a Board Game.
This link is to the teacher materials and you will find links to the student handouts. You need a teacher account to access the materials.
This well-known game can be modified for the blind. You could use images here to give your students examples of what can be done. (This site has a lot of links, which have not been checked out for child-appropriateness, so use it yourself, rather than give students the link)