The document discusses how the author has changed their behavior by studying more and becoming better over time. They now worry about their studies and are less easygoing and disobedient, which has led to improved grades compared to when they were younger.

2.  Now I have changed my behavior: I
study more and I am better and better. I
worry about my studies and I am not so
easygoing and disobedient and my
grades have improved as they were
worse when I was younger