PLATO Courseware has ACCUPLACER prep courses. We had access to PLATO for other subject matter and were pleasantly surprised when we noticed ACCUPLACER was in there too. Because she wanted to take the test by a certain date, my 10th grader flew through the PLATO stuff in a few weeks (didn’t finish). She scored very well on all sections, including maxing out her scores on the two math sections. She said PLATO was very helpful for review, but she’s a strong math student to start with. Ideally a student would want at least a few months of study time to go through all that PLATO offers.