The TEAS test measures your general knowledge of four subjects: Mathematics, Science, English and Language Usage, and Reading Comprehension. As of August 31, 2017, the TEAS V will be retired and replaced by an updated version, the ATI TEAS (also referred to as the TEAS 6). There are 2 versions of the test: electronic and paper and pencil. The type of test you take depends on where you are taking it. The content on the test is the same no matter which version you take.