Instructors show children the images and note:

• The geometrical form featured in the top image is called a shoulder.
• The shape featured in the bottom image is a blade as in lesson 28, but with the double curve reversed.

Children study the top image and complete the following drill work:

1. Draw Exercise A, then B, then C.
2. Draw Exercise A, then B, then C.
3. Draw Exercise A, then B, then C.
4. Draw Exercise B, then C, then D.
5. Draw Exercise B, then C, then D.

Children study the bottom image and complete the following drill work:

1. Draw Exercise A, then B, then C, then E.
2. Draw Exercise A, then B, then C, then E.
3. Draw Exercise B, then C, then D, then E.
4. Draw Exercise B, then C, then D, then E.
5. Draw Exercise B, then C, then D, then E.