If you are going to post criticism via an online platform - make
yourself anonymous. Start with the username, and maybe tweak the
privacy settings a little, though it would be pointless if nobody
could access it..if anything is to be done, you could try
approaching staff members of the school, or drop an anonymous
letter citing the problem and reasons why it should be
resolved.
In the event that you are confronted, and forced to delete the
blog, you can copy the contents and dump it on a new blog with a
different name. When questioned, you can just bua bodoh and pretend
as though someone else out there shares the same grievances as you
do. If the school persecutes you in an unreasonable manner, do not
be afraid to pull your parents to your side, as there is nothing
shameful in gaining leverage in an ugly situation.
But problems that revolve around the teacher are usually
difficult to resolve without concrete proof of incompetency. There
was a time where my classmates and myself had our test timings
compromised - we had a full 15 minutes out of 50 cut off an
important test paper, simply for being "noisy" when the old hag
just kept bitching on about silence during the test period, failing
to realize that her noise was the only one resonating around the 4
walls. We ended up with a petition and went straight up to the
principal's office. We were not disappointed.
If there is a real problem with the teacher, your peers would
have it too. However, if the teacher only picks on you, it would be
a good time to reflect on what you might have done to warrant the
crosshair. Should the issue persist, seek help from your parents
and resolve the matter with the teacher directly.
Cheers!