We learn more by looking for the answer to a question and not finding it than we do from learning the answer itself.
-- Lloyd Alexander (1924-2007)
Learning is searching!
Just like playing hide and seek, if we can find the people easily, we do not explore all the possiblities and explore new places.
The joys of the game is lost, and we do not learn much in the process of searching!
So, if you are slow in certain subject, you may just need more time to try and explore.
The searching process is a good experience and may help you in your future study!
Just remember, different people learn the same thing in different way!