What's it like to have a son with the lowest grade in the class?

My son has been scum since kindergarten. He has been in primary school for six years, and the penultimate baby is the son of a small boss of a real estate company in Shenzhen. Every year, best friends greet their last boss. Never transfer or send him abroad, or my baby will be the last boss. The year before last, his parents-in-law (all civil servants and technicians, retired after retirement) came to take care of the baby full-time. A few months ago, I looked at the results of Grade Two: before class 10, before grade 50, and the upward trend was very strong. Basically, I got full marks in all three main courses, and my previous score from the bottom with him has also improved a lot (by the way, my baby's junior high school is also in the forefront in Shenzhen). My baby is not stupid, but the biggest problem during primary school is that he is not serious and has no rules. After my father-in-law came, he paid great attention to his study habits and living habits. Now, even the best friends dare to do some things after returning home, such as reading books, practicing Chinese calligraphy, exercising, and never turning on TV and mobile phones at home. My best friend hasn't played DOTA with me for a whole year and a half, because she keeps exercising and is in good shape and mental state.