So you gave this survey and they got to write whatever they wanted as an answer. Is that correct?
Now you realize you should have done a multiple choice answer...

If the above is correct, I'd use this survey to make up the multiple choices for the next survey that you can count the responses.

The problem, if they got to write their own answers is. How do you discriminate "Like School" from "Like Enviroment"? You will need to read every answer and see what they meant and give it a standard word or phrase that you can count.