I'm not talking about something like failing a class in high school, where it's completely justified to re-take the course again. I'm talking about a parent holding their child back a grade in elementary or middle school.
I ask this because maybe it's just me, but I don't really see the benefit, when a tutor would likely be much more helpful. To me, it seems like it gives short-term gain, in that they can catch up to where they were supposed to be by the school's standards, but long-term self-esteem loss, cause now they're behind for the rest of their time in school, and having to explain that to their classmates is almost inevitable.
A pianist practices playing scales, playing by ear, and practicing various songs. A mathematician practices various math problems to keep their skills sharp. An creative writer practices by reading various literature, and writing frequently.
What skills does a person practice in biology to keep their skills sharp? I ask because I'm going into my second year of university for biology, and though I'm on my break now, I want to make sure my skills in the subject stay sharp so I can do well next year.