(Normal Skin/Lymph) you get to be the instructor! Your job is to teach your peers about a topic related to the dermatologic or lymphatic system. As you are preparing your information, think about the most important aspect of your question and how you can be the expert for your peers. Be creative! Use visual aids, diagrams, etc. to help your peers learn. Some type of teaching or visual aid is required, in addition to your text response to the question. B-5: It is well known that handwashing is critical to preventing the spread of infection. Explain how excessive handwashing may in some cases increase the potential for a bacterial skin infection.