Adaptive practice built on Item Response Theory. Targets your weakest competencies first — until you're ready to pass.
Start your free diagnostic in under a minute. No credit card, no sign-up required to try. The engine will tell you exactly where your gaps are.
Start with zero experience. Each course is ~3–4 hours, self-paced, and runs live in your browser — no install, no payment.
A 10-minute placement session maps your ability across every competency. No grinding topics you already know.
The engine picks questions at the exact edge of your ability. Correct → harder. Wrong → worked example, then retry.
Hit a knowledge gap? A 15-minute learning loop opens, closes it, then returns you to the original question stronger.
A live predicted score tracks your readiness every session. When it hits the passing threshold — you're ready to book.
Three live views you get inside QuantegyAI: the adaptive engine picking your next question, a mastery map across every competency, and a readiness score that climbs in real-time as gaps close.
Which of the following equals i23?
The engine uses a 3PL IRT model — the same framework behind the SAT, GRE, and TExES itself. Every question carries a difficulty, discrimination, and guessing parameter. Your ability estimate updates after every answer, and the next question is chosen at the exact boundary where learning happens fastest.
Five years. Hundreds of students. 100% pass rate. Dr. Mienie Roberts is a mathematics professor who built QuantegyAI after watching students fail expensive exams because their prep didn't target their actual gaps. Every question, worked example, and adaptive nudge comes from what she's seen move students from "not sure" to "passed."
🎥 Talk to Dr. Roberts on Zoom →A growing list of teachers who built their certification prep with Dr. Roberts.
Dr. Roberts worked with me and I passed my certification exam!
I failed twice before finding QuantegyAI. The diagnostic showed me exactly what I was missing — I passed on my third attempt with a 268.
The 15-minute study loops fit into my lunch break. I studied for 3 weeks and passed the first time.
Her teaching methods helped me pass the 7-12 Math TExES state exam.
Dr. Roberts and her team prepared me and I am a middle school teacher today!
The free diagnostic is always free. When you're ready to unlock full practice, choose a plan. Praxis 5165 is currently in free preview — full access at no cost.
Limited slots available. After booking, platform access is granted within 1 hour.
Need 30 seats? $499/yr → · Need 50+? Get a quote
Pass-or-refund: complete 90 days of active practice on your chosen exam and if you don't pass, we refund the 90-day pass. See full refund terms.
Today, fully live: TExES Mathematics 7-12 (235) with 2,000+ calibrated items across the full TEA blueprint, plus a free Praxis Mathematics 5165 sampler and a free Core Subjects EC-6 math (291) lesson course. In active calibration: TExES Math 4-8 (115) — sign up for early access. On the roadmap: STR (293) and Special Education EC-12 (161). The exam picker above has notify-me links for each.
Yes. Each exam's question bank is mapped to the framework published by the relevant agency (TEA for TExES, ETS for Praxis). For TExES Math 7-12 (235) that's the six TEA domains and twenty competencies; for Praxis 5165, the seven ETS content categories. Every item is tagged to a specific sub-competency so your gap report reflects the actual test blueprint.
QuantegyAI was built by Dr. Mienie Roberts, a mathematics professor who has prepared students for the Texas teacher certification exams for the past five years with a 100% pass rate. The item bank was authored and reviewed against TEA framework descriptors.
Books and videos give every student the same material in the same order. QuantegyAI estimates your ability after each question and picks the next item from the zone where you actually learn — neither too easy nor too hard. You spend your study time where it changes your score.
No. QuantegyAI runs in any modern browser on phone, tablet, or desktop. Your progress syncs to your account so you can switch devices.
Your email and response history are stored in an encrypted database and used only to adapt the engine to you. The privacy policy covers this in detail.
Yes. Create a free account and get a free adaptive sample on any live exam — 12 questions on TExES 7-12, 14 on Praxis 5165 — enough to see how the engine behaves on your specific strengths and gaps.
If you buy the 90-day pass for an exam, complete a minimum practice threshold across the ninety days, and do not pass that exam, we refund the cost of the 90-day pass. The exact threshold and submission steps are listed on the refund page inside the app.
Yes. Each exam is a separate purchase — your progress, mastery estimates, and readiness score are tracked per exam so a Praxis prep cycle doesn't muddy your TExES estimate (or vice versa). The exam switcher inside the app lets you flip between them at any time.