If I could give them zero stars I would do it.

If I could give them zero stars I would do it.
I bought Wiskunde A for VWO ( 250)
It is not a good course. There are a lot of exercises with little explanation about the theory / formulas.
There are hundreds / thousands of errors in this course.
Errors that could have been resolved without any mathematical understanding.
Errors about the theory.
Wrong Answers.
Figures that disappear and appear.
More answers than exercises.
Answers that come in a completely different order (which is 1/5 of the time)
etc.
In other words; don't waste your time on this