The placement test is very important and should be completed before starting to teach the lessons in the book.
The student’s performance on the placement test will show the teacher exactly what level of knowledge the student is at. The placement test is a test of all of the material that is taught in the book, so after a student takes the placement test, the teacher will know exactly which lesson to start with the student on.
Students come from different backgrounds and have different levels of knowledge. It is not fair to start from the Lesson 1 with a student who already knows the material taught in the Lessons 1-4 for example. That student should start with Lesson 5. This test will tell the teacher exactly where he/she should starts with each student, which saves time for both the teacher and the student.