That's something I have also read about Donald Knuth. In his first years, he spent additional time on solving all available mathematically problems for a class until he became much more proficient in it than his peers.
Starting to work on the syllabus of a class before your peer students can do definitely has lots of benefits, I've tried it before, and it has always landed me ahead of my peers.
You can also use this in other areas of life. Its better to start on the next challenge even if no one is offering you an opportunity.
You can also use this in other areas of life. Its better to start on the next challenge even if no one is offering you an opportunity.