Make the School Girl's Puzzle Quilt Block
If you plan to make a quilt from many identical blocks, you might prefer to use a different method for half square triangle units, such as sewing them on a grid. Be sure to use a technique that will result in half square triangle units that finish at 3" x 3" (or are 3-1/2" x 3-1/2" before sewing them to their neighbors).
- Pair a 3-7/8" grey square with a green square of the same size. use the easy sandwich method to turn the pair into two half square triangle units, each with a grey half and a green half. When complete, the units should measure 3-1/2" x 3-1/2".
- Arrange two gray triangles cut by dividing a 3-7/8" square in half diagonally as shown in the upper left of the illustration, sewing them to sides of Step 1 unit. Press seam allowances towards the triangles.
- Sew a large green triangle to the unit you just created as shown. Press seam allowance towards the green triangle. Repeat to make another identical unit.
- Pair a 3-7/8" gray square with a black print square of the same size. Use the sandwich method to make two half square triangle units that measure 3-1/2" x 3-1/2".
- Repeat to make two more grey/black print half square triangle units.
- Sew a gold square to the side of a grey/black triangle square unit as illustrated, middle left. Press seam allowance towards the square. Repeat to make another rectangular unit as shown.
- Sew the units together as illustrated. Repeat to make a second identical unit. Press seam allowances either way.
- Sew a green/gray unit to a gold/black/gray unit as shown to create one row for the quilt. Press seam allowances towards the large triangle. Repeat to make another identical row.
- Flip one row around as illustrated and join rows. Press. The quilt block should measure 12-1/2" x 12-1/2".
