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After I have marked the dictation exercise books, I should ask my pupils to:
1.make correction.(or)
2.make corrections.(or)
3.do correction.(or)
4.do corrections.
Are these sentences all correct? I 've checked the Longman dictioinary,correction can be both countable and uncountable. Shall I write down "correction" or "corrections" on the top of the exercise books?
To my knowledge, teachers would "red" mark the wrong words/parts/portions/etc and write at the top of the page: "Do/make the corrections" or simply " for correction".
correction or corrections 
Linear Mode
