| DCS # | DEMONSTRATION | REFERENCE | ABSTRACT |
|---|
| 9A10.00 | Blackboard Tools | | |
| 9A10.10 | compass | PIRA 1000 | |
| 9A10.11 | compass | 6-1.4 | Modifying a steel tape measure to make a blackboard compass. Diagram. |
| 9A10.12 | protractor | PIRA 1000 | |
| 9A10.12 | protractor | 6-1.3 | A blackboard straight edge with a permanently mounted angle indicator. Diagram. |
| 9A10.14 | drawing conic sections | TPT 4(1),19 | Simple blackboard tools for drawing the ellipse, parabola, and hyperbola. |
| 9A10.15 | drawing vectors | M-10b | A drafting machine mounted on the blackboard helps in drawing vectors. |
| 9A10.21 | blackboard graphs | 6-1 | Sources of helps for making large blackboard graphs. |
| 9A10.21 | blackboard graphs | 6-1.6 | Slides of coordinate systems can be projected on the blackboard with an overhead projector. |
| 9A10.31 | angle templates | PIRA 1000 | |
| 9A10.31 | angle templates | 9A10.31 | Large triangles are used on the chalkboard. |
| 9A10.34 | templates for drawing waves | 6-1.5 | Cardboard templates for various sine waves. |
| 9A10.35 | sine wave templates | PIRA 1000 | |
| 9A10.35 | templates for sine curves | AJP 43(10),927 | Make a Masonite half period template with a scale at 10 degree intervals. |
| 9A10.40 | moveable blackboards | AJP 55(3),219 | A long article on movable blackboards. |