Proofreading / grammar expert

I’m looking for a proofreading/grammar expert that can help with an initial set of documents related to educational robotics, technologies 4.0, and science for k-12 academic level. Documents were created in Spanish and translated to English by non-native speakers. Documents are clear and concise and average 300 words per file. Documents need to be refined and grounded to USA English language. The skilled freelancer needs to have the experience to tailor the message/documents according different academic levels (elementary, middle school, and high school). Ideally would be needed someone with experience in education. This will be an ongoing stream of work. You can find an example of the type of documents attached. 1 job will consist of revising several documents that in total adds up in average 5,000 words.

Note: I own this documents and I want them revised for English Grammar. They are NOT part of any school assignment or project.