Don't stress yourself. You won't be needing that stuff to get through your training at school.
I think it's best to have all your endorsements, and that is what that material is for. Don't overload yourself at the last minute. You don't need the information in that section to pass your permit test.
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I'm stressing over the section of the The High Road Training Program for Hazerdous Materials (Endorsement). I asked a question yesterday and this is what I was talking about. Is all the material in this section for the endorsement only and not required during school? I'm trying to focus on preparing myself for what I'll see next week when I get to school at Trainco.