Biology

• Since nurses often deal with patients and treating physical illnesses, it's important that you succeed in biology while in high school. For example, in high school you learn about the human body and its' many components such as the cardiovascular and skeletal system.
  
  

Chemistry

• Nurses also prepare and prescribe medications for their patients, and this requires a thorough knowledge of different chemicals because it will help you understand why certain medicines work on patients while others are more harmful. So you should also take chemistry in high school.
  
  

Mathematics

• High school students who want nursing careers should take math classes because this will help them later when they have to calculate the right kinds of prescriptions. Nurses also use math when they record patients' blood pressure and heart rates.
  
  

Reading

• Because nurses also read plenty of complex material, it's especially to take classes that deal specifically with reading comprehension. If nurses don't read the right directions and follow them at work, the consequences can be bad for the patients.
  
  

Health and Nutrition

• Depending on the high school, some students may take health classes in addition to physical education. Health classes teach about nutrition, the importance of physical exercise, and information on major illnesses such as heart disease, cancer and STDs.