Best free resources for AACC prep in 2026 — compiled list

The official candidate guide is something a lot of people skip but it literally tells you the topic weighting and domain breakdown. It's the roadmap for your study plan. Never skip it.

Great list. I'd add: LinkedIn Learning has some healthcare & nursing-related courses that overlap with cert content, and if you have a library card many libraries give free access to it. Also check if your local library has access to O'Reilly or similar — tons of technical content there.

For AACC - American Association for Clinical Chemistry Certification specifically, I found the PracticeTestGeeks explanations were detailed enough that I didn't need to buy a separate study guide. The combination of doing the practice questions + reading every explanation (for both right and wrong answers) covered most of the content I needed.

Honestly I almost quit around week 3. The material felt impossible and I wasn't retaining anything no matter how many times I read the same chapter. What actually turned it around for me was switching from passive reading to doing practice questions first, then going back to fill in the gaps. Sounds backwards but it worked.

If you're feeling like you're not cut out for this, keep going. I failed two practice tests before I ever passed one, and I still ended up clearing the real exam on my first attempt. The explanations on the practice questions are where the real learning happens, not the questions themselves. Don't skip them even when you got the answer right.

The thing that actually moved the needle for me was obsessing over the wrong answers. Like, don't just note that C was right — figure out exactly why A and B were wrong. I'd spend more time on the distractors than the correct answer, and it felt slow at first, but my retention was way better because I actually understood the concepts instead of just pattern-matching.

PTG's explanations are really good for this. Some sites just tell you the answer, but when it breaks down why the other choices miss the mark, that's where it clicks. Honestly it changed how I approached every practice question after that.

Just finished my AACC last week and honestly this list is solid — I used a few of the same resources. The one thing I'd add is that for Clinical Chemistry specifically, don't just drill questions in isolation. I was getting maybe 70% on practice sets but felt shaky until I started working through the why on every wrong answer, not just flagging it and moving on. That shift alone probably added 10 points to my score.

PracticeTestGeeks was my daily driver for the final three weeks. The explanations on the trickier enzyme kinetics and immunoassay interference questions were genuinely better than what I found in some of the paid banks. If you're not using it yet, their aacc practice test section is worth bookmarking early — the question volume is enough that you don't burn through it in a sitting.

One specific thing that helped me: I made a one-page cheat sheet of the common interferences (lipemia, hemolysis, icterus) and how they skew each assay type. Sounds basic, but those questions appear more than you'd expect and they're fast points if you've drilled the patterns. Good luck to everyone still in it.