I am signed up for a Dosage Calculation class this Sept along with the regular 1st semester nursing classes. It is not required. Many people are telling me to drop this and learn it on my own this summer to lighten the load this fall, not to mention save the money. Other student nurses say 'why have extra tests?'. Do I need to know more than basic math. My option is to buy the book and work on it over the summer. Please advise!!!!!!