Past papers are great for math. They are also useful for improving essay based subjects like English Paper 1 or economics essays, especially for essay structure, explanation of arguments, and text analysis. However, for many other IB subjects, this is not the case. Subjects like economics excluding essays, biology, chemistry, and computer science are far more concept based and explanation based. Past papers help with pacing. They help with familiarity with question types. But they do not build u