Objective:

Students will demonstrate how to use the scribe notches on a speed square to mark consistent, parallel layout lines on a board.

Materials Needed:

• 1x6 or 1x8 board (at least 24 long)

• Pencil

• Speed square

• Tape measure

• Ruler or straightedge

• Safety gear (glasses, gloves optional)

Instructions:

1. Mark a baseline – Use the speed square to draw a straight baseline across one edge of the board, 1 from the edge.

2. Measure and plan – Measure out and plan for 5 parallel layout lines at ½ increments.

3. Use scribe notches – Insert a pencil into the scribe notch at ½, hold the square flush to the edge of the board, and slide it along while keeping the pencil in place to draw your line.

4. Repeat – Repeat the process using 1, 1½, 2, and 2½ notches.

5. Check accuracy – Use a tape measure or ruler to confirm the distance between each line.

6. Label – Lightly label each line (½, 1, etc.) for review.

7. Submit – Turn in your marked board for assessment.

Rubric: Scribe Lines Challenge (10 Points)