This post may contain affiliate pay for homework. However, there are many students who need help or work done on their behalf and are willing to pay for great work.
If you are concerned, you may want to consider editing, tutoring or working with students. Keep in mind however, that if you are informed about finances, math, accounting, physics or are a great essay writer, there is a huge amount of money to be made in those areas as well. Just look at a few freelancing or short task sites. Student assignments will be posted and you can give your offer on what you will complete the assignment for. Generally, students will pay well, particularly if they have a deadline coming up soon.
All you have to do is register, send some samples, and get verified through the site. Once that is complete, you can begin bidding on the jobs you want, and accept jobs when the terms fit your needs. It can be difficult to trust that a virtual stranger will pay you when the assignment is complete. I have even been personally contacted by employees of the site seeking feedback on certain features. Realistically, you should consider the work you did best in school and focus on jobs in that area. Play to your own strengths and you will find everything more satisfying and less stressful.
Some other sites require a certain educational degree to participate, but others accept writing samples as proof enough of your skill set. This site allows students to ask questions that will be answered by experts. Get registered as an expert in your field and you will be paid for each question you answer. Just Answer This site caters to people looking for help with homework, advice or everyday situations, and provides compensation for answers. Browse questions posed by ordinary people and answer to your strengths and you can earn great pocket money. Try Swagbucks, the famous rewards program that pays you for watching videos, taking surveys, shopping and more. Like the sites above, this site allows you to register to answer questions.