Use the following plan to create the template. If you have a
printer that can print on card stock (stiff paper) 18+ inches
wide, go to the SVG
and print out the image at full size (100%
scaling). Otherwise, you'll need to measure, mark, and draw
this plan on the card stock.
Cut away the tan parts of the plan, leaving just the purple
part. Use scissors to cut out the five notches around the
perimeter. Use a hobby knife to cut out the six tiny triangles
along the vertical line inside the plan, and the hole for the
Make enough templates so that the students don't have to wait
too long to have a turn using it, such as one template per
four students in the class. The templates can be reused.
Using the Template
Here are instructions for the students.
- Place the plan on the cardboard with the horizontal
edges exactly parallel to the "grain" of the cardboard
(the direction of the long pleats inside the cardboard).
The pleat lines are faintly visible on the cardboard.
- Tape the plan to the cardboard to keep it in position.
Using a pencil, draw around the perimeter of the plan.
Include the five notches around the perimeter, the six
tiny triangles along the vertical line inside the plan,
and the hole for the lens. Untape and remove the plan.
- Draw the solid and dashed lines shown in the following
diagram. The horizontal lines should be exactly parallel
to the pleat lines.
- Proceed with the cutting
step of the project.