Preparing for TExES Core Subjects EC-6 (391) Mathematics?
Find your math knowledge gaps before exam day. Looking for an EC-6 math study guide, practice test, or practice questions? Start by finding out which mathematics areas actually need your attention — then focus your preparation there.
12-question adaptive diagnostic · about 10 minutes · No credit card required
Looking for a structured course? Browse our dedicated EC-6 Math course modules with interactive lessons for each competency.
Make your EC-6 math preparation more focused
Preparing for the TExES Core Subjects EC-6 (391) means preparing across several subject exams at once — which makes your study time valuable. When it comes to mathematics, QuantegyAI helps you move beyond simply working through another generic study guide or set of practice questions. Instead, start by asking: which mathematics areas do I need to work on? The free diagnostic identifies where you’re currently stronger and where additional preparation is needed, so every practice session targets what will actually move your score.
About the TExES Core Subjects EC-6 (391) Mathematics subject exam
The TExES Core Subjects EC-6 (391) certifies teachers to teach kindergarten through grade 6 in Texas public schools. It replaced the old Core Subjects EC-6 (291) in January 2022, and the structure changed in a way that matters for your prep: the 391 is made up of five separately passed subject exams. Mathematics (902) is its own exam — 40 questions, about 70 minutes, with its own 240 passing score.
| Subject exam | Code | Questions |
|---|---|---|
| English Language Arts & Reading | 901 | 45 |
| Mathematics ← you are here | 902 | 40 |
| Social Studies | 903 | 40 |
| Science | 904 | 45 |
| Fine Arts, Health, & PE | 905 | 40 |
Need extra help with Mathematics (902)? QuantegyAI focuses specifically on the mathematics portion of Core Subjects EC–6. Your official retake options depend on your results across all five subject exams, so confirm what you can schedule in your TEA testing account or with your certification program.
Mathematics (902) combines elementary content with the instructional decisions an entry-level teacher must make. Competency 001 explicitly assesses Mathematics Instruction: how students develop understanding, how misconceptions appear, and which representations or responses move learning forward.
All 6 Mathematics Competencies Covered
Looking for an EC-6 math study guide?
A study guide can tell you what mathematics content you should know. A practice test can show you which questions you got right or wrong. Neither can tell you which parts you need to spend the most time on. That’s where QuantegyAI’s diagnostic-first approach comes in: start with a free mathematics diagnostic, identify your gaps, and then build your preparation around the areas where you need it most — targeted practice questions, worked explanations, and progress tracking toward exam readiness.
How adaptive prep is different
Static EC-6 math guides waste your time on material you already know and move too fast past your real gaps. Most candidates have solid number sense but weak geometry or measurement knowledge — and almost everyone underestimates the C006 mathematical learning and instruction competency.
QuantegyAI uses Item Response Theory to estimate your ability on each of Mathematics Competencies 001–006 independently. The Quick Diagnostic takes 12 questions to find your initial gaps and start your readiness estimate. Calibration continues as you practice, so the estimate becomes increasingly precise and the study plan keeps targeting what will move your score.
What’s in the question bank
- 696 practice questions in QuantegyAI, professor-authored and aligned to the Mathematics (902) competencies
- Full coverage of official Competencies 001–006, including Mathematics Instruction (001)
- Worked explanations on every question — not just an answer key
- Interactive review widgets for number lines, fraction models, geometry, and data displays
- Full-length mock exams simulating the real 40-question Mathematics (902) subject exam
- Real-time IRT score updates after every question
Pricing
Includes EC–6 Math full access, a 30-minute session with Dr. Roberts, and a personalized Mathematics study plan. The pass-or-refund guarantee is not included for EC–6 Math.
7-day satisfaction refund
Not the right fit? If you’ve answered fewer than 25 practice questions since buying, request a full refund on your Full Access Pass within 7 days of purchase. Free-tier questions answered before you bought don’t count. See terms →
Built by a mathematics professor
QuantegyAI was built by Dr. Mienie Roberts, a mathematics professor and active reviewer for the Texas Instructional Materials Review and Approval (IMRA) process. The question bank, adaptive engine, and every review widget are built in-house — not licensed from a third-party generator. Dr. Roberts has a 100% pass rate among the 47 students she has personally tutored over the past 5 years.1 Rather than simply providing more content, QuantegyAI helps candidates answer the question that actually determines a pass: what should I focus on next?
1. Pass rate refers to certification-exam outcomes for the 47 students Dr. Mienie Roberts personally tutored during the past 5 years — 47 of 47 passed. Documented evidence is kept on file and available to institutional and procurement reviewers on request.
Frequently asked questions
How many math questions are on the TExES Core Subjects EC-6 (391)?
The Mathematics subject exam (902) has 40 selected-response questions with about 70 minutes of testing time. The full 391 is made up of five separate subject exams (901–905) with 210 questions and roughly 5 hours in total.
What is the passing score?
Each of the five subject exams is scored separately, and you need a scaled score of 240 (on a 100–300 scale) on each one. Mathematics (902) has its own pass — unlike the old 291, there is no combined overall score.
Can I retake just the math subject exam?
QuantegyAI focuses specifically on Mathematics (902). Your official retake options depend on your results across all five subject exams. Check your TEA testing account or certification program to confirm what you are currently eligible to schedule and what waiting period applies.
What happened to the EC-6 (291)?
The 291 was retired on December 31, 2021 and replaced by the Core Subjects EC-6 (391) on January 1, 2022. The 391 splits the exam into five separately passed subject exams, and 291 subject scores can’t be combined with 391 scores.
Is the math exam the hardest part of the EC-6?
For most test-takers, Mathematics and Science are the two most challenging subject exams. The math exam covers content through early algebra and geometry — broader than what elementary teachers typically teach day-to-day — and the C006 mathematical learning and instruction competency (how young children develop number sense) trips up candidates who know the math but haven’t studied developmental learning theory.
How long should I prepare?
For candidates with solid elementary math content knowledge, 3–5 weeks of focused adaptive practice (3–4 sessions per week, 30–40 minutes each) is typical. The free diagnostic pinpoints your gaps on day one.
Is there overlap with the TExES Math 4-8?
Some overlap exists in number sense, operations, and basic algebra. The 4-8 goes deeper into proportional reasoning, linear functions, and statistics. If you’re considering both certifications, studying both exams makes sense — your progress on shared content carries over.
12-question adaptive diagnostic · about 10 minutes · No credit card required
Written by Dr. Mienie Roberts — mathematics professor and founder of QuantegyAI. Last updated 2026-08-20.