Please review my letter and suggest changes if required .

Dear Student,
Here are the changes that are required: The changes on the right side of the "=>" sign implies the correct changes required.
Toward=> Towards
from a long time=> For a long time
From a few weeks=> Since a few weeks
is increased => Has increased.
Should know=> can know/may be informed.
I would like to appreciate your effort and your calligraphy! 
Regards