AJN Book of the Year 2008 Learning drug calculation is one of a nursing student's most time-consuming and important tasks. Calculating Drug Dosages, 2nd edition, makes learning dosage calculation--even reviewing basic math principles--fun and easy! All modules have been updated to address medication errors and safety and the National Patient Safety Goals set forth by JCAHO. Plus, a new software interface presents a bold improvement to an already successful learning tool. It teaches all major methods -- linear ratio and proportion, fractional ratio and proportion, dimensional analysis, and the formula method. Every method can be used for every problem.