Proofreading 653 Science Quiz Questions (2 freelancers) [URGENT]

I have 1306 quiz questions on Science for a mobile app. I will hire two freelancers to proofread them. I won't pretend this is going to be an easy task because almost every single question needs extensive rewriting. The difficulty ratings (1 - 100) mean: 1-10: pre-school (aged <=6) 11-20: lower primary (aged 7-9) 21-30: upper primary (aged 10-12) 31-40: lower secondary (aged 13-14) 41-50: upper secondary (aged 15-16) 51-60: college (aged 17-18) 61-70: university year 2 (aged 19-20) 71-80: master's 81-90: phd 91-100: professors You should check to make sure: - there are no typos - the grammar is impeccable - the sentence structures are correct and succinct - the language expressions are not awkward - the question is clearly and correctly formed, eg. no ______ after a question mark - the difficulty rating at the bottom of each question is reasonable - the first answer option is the correct answer (Check the internet if you suspect it is wrong, or think it is poorly presented. Remove the whole question if it is a bad question.) - the questions are varied and not repeated - there is only one correct answer and the four answer options are not unreasonably close or ridiculous A higher rating should mean fewer players capable of answering the question. Do not use special non-standard characters. You will have to turn on Tracker in Word so that I will be able so see the changes made. Strict formatting rules must be observed as a text file will be read and parsed directly by the server. The Merits page in the game will bear your name. This project must be completed by 9 Jan 2017.