Anyone take CNA course in high school?

My 18 yr old senior is taking a CNA course at her high school next semester. Anyone else here take it during high school? How was it? What can she expect? She plans to go in to nursing right away out of high school. I feel like doing CNA work might affect younger people differently than it would someone who is older so that's why I'm asking. I didn't become a CNA until I was 43 so I had lived quite a bit of life already by that time so I can't relate to what it would be like to go through the class while still in high school.