About the Academic Collocation List
The Academic Collocation List (ACL) was compiled by Pearson from a 25-million-word corpus of published academic English — journal articles, textbooks and academic writing across every major subject area.
It contains the 2,469 most frequent and useful collocations in academic writing, drawn from 742 headwords. If you know the ACL, you know the word pairs that examiners have been trained to reward on PTE Academic, IELTS Academic and university entrance tests.
The 324 collocations in this bank are the highest-yield subset — the pairs that appear most often in real PTE Reading and Writing tasks.