Take the test Prerequisite Unit 4 below 

You need a score of 80% or better to start Unit 4
If your score is below 55%, we encourage you to do (or review) Unit 2 and Unit 3 before starting Unit 4 in order to consolidate your basics.
If your score is between 55% and 80%, Please take the test again. Feel free to go back to Unit 3 to review some lessons to ensure a pass next time!

Questions/Help