The Academic Word List is a list of 570 words that appear frequently in all academic texts. This means that they are very general academic words. They are not specially connected with any particular subject and so they are very useful for all students.
The list was created by Averil Coxhead, who analysed hundreds of academic texts, from all subject areas, to see which words were common to all these texts. She then divided the 570 words into 10 lists (called sub-lists of the Academic Word List) according to how frequent they are. Sub-list 1 has the most frequent words, and sub-list 10 has the least frequent words. Each sub-list contains 60 words, except sub-list 10, which only has 30.