The only way to truly tell if the sewing machine has been threaded correctly is to try a line of test stitches.This test includes that practical element plus a written component to gauge student understanding.
This document contains the written questions for students to complete after the practical threading test, as well as a performance rubric for evaluating the practical test.
-what is the purpose of a backstitch?
-where does a backstitch happen?
-what would stitching look like if the machine is not threaded correctly?