The key of successful marketing is in the analysis of the audience. You need to think what these students are looking for, and make your product as much comfortable for them as possible. To make it clear, I'll use an example - for example these guys https://studydriver.com/leadership/ have created free essay ideas for all the most popular topics, like for example leadership, family, books and so on, and they also have the option of buying an essay. They have analysed their audience and have made a perfect model for their business. Thats what you can call a good marketing strategy!