Subject Module Deep Dive 2026 The 6 TestAS Subject Modules Compared: Which One Should You Choose? A full breakdown of every Subject-Specific Module offered on the official TestAS — topics covered, testlet structure, and how to pick the right one for your intended degree field. 👉 Practice Engineering, Medicine, Economics & Humanities: testasprep.netlify.app Figure 1: Engineering Subject Module practice lab on TestAS Mastery. After the Core Module, every TestAS candidate sits one Subject-Specific Module matched to their intended field of study. Unlike the Core Module — which is identical for everyone — the Subject Module tests your ability to comprehend and apply concepts from academic material relevant to...