Okay, let’s tackle this. So Lisa Kein has 20 years of experience as a school nurse. Location is the United States, which is a broad region with varying salary ranges. Considering her role and experience, she might charge lower rates compared to other healthcare professionals. Nursing professionals in the US, especially those in school nursing roles, can charge around $60–$90 per hour. However, this rate is highly dependent on factors like location, employer, and specific job requirements. Given the limited information, I'll estimate a rate of $75 per hour, which is on the higher end of the average range.