Sorry mate, they only taught me the perfect way to use chalk (Shawbs). Having graduated, I had to learn to use whiteboard pens, with very limited success (slipping rulers creating nasty breaks in my lines!)
I soon had a word with myself, ditched that altogether, and if something was worth a drawing, I would use a bit of plain paper on a desk, neater, and less 'me instructor - you student' feel to imparting knowledge.
For God's sake don't employ such original thought to an upgrade though chum...
Good luck, and enjoy the extra pay