We just started the new college entrance examination curriculum reform in 2009.
I don't know the situation in other areas.
But as far as our current textbooks are concerned,
Compared with the previous People's Education Edition, mathematics has added a lot of elective contents and deleted some difficult ones (especially trigonometric functions).
There is not much difference between Chinese and English. English textbooks tend to be colloquial
Chemistry has added a lot of college content.
There are many physics test sites that were not used as test sites before, but now they are used as test sites.
So just focus on math and chemistry.
You should have learned everything else.