remake all tests and exams
They look like they were made by a drunk person, all of them. I finished 7 of your courses, and they all look this way. A lot of grammar mistakes, questions unrelated to the course material (have to google to find the answer), answers like "All of the above" in the upper position (nothing is above), answers like "[something]", "[answer that is incompatible with the 1st answer]", "All of the above". I also noticed that if there is "All of the above" present, it's the right answer most of the time. The tests also have a lot of questions with 2 possible answers while giving 2 attempts. This is bad.