Studypool
Studypool is a great platform for students, besides you can find many learning materials on this site, you can make money from it.
You can post old study materials like past homework, projects, reports, presentations, papers, etc that students can review as references, detailed class, and lecture notes to help students learn and understand academic concepts.
Every document you post contributes to Studypool's vast archive of materials. They will share your docs with 10’s of millions of students. Also, for every click from people searching for the document, you will receive $10.
When you use your phone, laptop or tablet to access this website, you can log in for free if you have Facebook or Gmail. You can then click on the word Sell Docs to upload the documents you have. This process will take from a few seconds to several minutes depending on the size of the file you are uploading.
After uploading documents, you just need to wait for others to click to see that you will earn money. This job does not take much of your time, maximum 10 minutes so you can spend time on other things.
This site accepts some file extensions: .png, .jpg, .gif, .tiff, .doc, .odt, .pdf, .rtf, .tex, .txt, .wpd, .ppt, .xls, .zip. Max Upload Size: 200 MB each
Website: https://www.studypool.com/home