There are a few other sites on the internet where dosage calculations can be practiced.  To check these out, just click on the underlined topics listed below.

                       

Critical Thinking: Nursing Calculations Part 1
http://www.rn.com/main.php?uniq=805715&command=manage_courselist&data%5Bcourselist%5D%5Bid%5D=1243&data%5Bsubmit_value%5D=Display%20Entry

Critical Thinking: Nursing Calculations Part 2
http://www.rn.com/main.php?uniq=328252&command=manage_courselist&data%5Bcourselist%5D%5Bid%5D=1324&data%5Bsubmit_value%5D=Display%20Entry