I need help to write a school grading essays

I'm looking someone to write a large number of essays for grading system (Grade 1+ to Grade 12+). Essays should be in 200 to 1000 words based on the subjects. I will pay $20/1000 words and need a 200 words sample (paid) before proceeding in large number. I need 250-200 essays at the beginning, but it will increase.