Remember: handwashing is the best way to avoid the spread of any infection!
Proper handwashing consist of washing your hands with soap under running water for at least 30 seconds, then drying.
The instant gel hand sanitizer or towelettes are adequate ways of cleaning your hands if you don't have access to running water and soap.
Wash your hands frequently, and encourage your students to do the same.
Next "What is the Exposure Control Plan and how do I get a copy?"