- You need a scaled score of 240 out of the possible range to pass TExES 236.
- Physics and Chemistry each make up 20% of the exam - 40% combined.
- The exam is 140 selected-response questions in 4 hours 45 minutes of testing time.
- A scientific calculator, periodic table, and constants reference are provided on-screen.
What the TExES 236 Actually Tests
TExES Science 7-12 (236) is the Texas Education Agency's certification exam for candidates who want to teach science to middle school and high school students across the state. Pearson administers the computer-based test on TEA's behalf, and the exam consists of 140 selected-response questions. Some administered forms may include unscored field-test items embedded within that total, so you won't necessarily know which questions count toward your score as you're answering them - treat every item as if it matters.
You'll have 4 hours and 45 minutes of actual testing time, inside a 5-hour appointment window that also includes a 15-minute tutorial and a compliance agreement you must complete before the clock starts on content questions. That's roughly two minutes per question if you pace evenly, though in practice you'll move faster through recall-based items and slower through multi-step Physics or Chemistry calculations.
If you're still mapping out what this certification involves before committing to a study plan, the What Is TExES 236? overview and the TExES 236 Certification page are useful starting points. This guide assumes you already know you're taking it and want a plan to pass on attempt one.
The 10 Domains, Weighted and Ranked
TExES 236 is organized into ten content domains, and they are not weighted equally. Two domains - Physics and Chemistry - together account for 40% of the exam, while several life-science and earth-science domains sit in the 6-9% range. Understanding this distribution is the single most important strategic decision you'll make before you open a textbook.
| Domain | Weight |
|---|---|
| 1. Scientific Inquiry and Processes | 10% |
| 2. Physics | 20% |
| 3. Chemistry | 20% |
| 4. Cell Structure and Processes | 8% |
| 5. Heredity and Evolution of Life | 8% |
| 6. Diversity of Life | 8% |
| 7. Interdependence of Life and Environmental Systems | 6% |
| 8. Earth's History and the Structure and Function of Earth Systems | 9% |
| 9. Components and Properties of the Solar System and the Universe | 6% |
| 10. Science Learning, Instruction and Assessment | 5% |
For a full walkthrough of every competency inside each domain, the TExES 236 Exam Domains Guide breaks down objectives and sample topics domain by domain. Below are three domains worth flagging specifically because candidates consistently underestimate them.
Domain 1: Scientific Inquiry and Processes (10%)
This domain tests how you design and evaluate investigations, not just facts about the scientific method. Expect scenario-based questions built around lab safety, variable control, and data interpretation.
- Identifying independent, dependent, and controlled variables in unfamiliar experimental setups
- Choosing appropriate lab safety procedures and equipment for a given scenario
- Interpreting graphs, tables, and data sets to draw valid conclusions
Domain 8: Earth's History and the Structure and Function of Earth Systems (9%)
Larger than several life-science domains combined, this one covers plate tectonics, rock cycles, weathering, and the interaction of Earth's spheres - often through scenario or diagram-based items.
- Sequencing geologic events using relative and absolute dating principles
- Explaining energy transfer between the atmosphere, hydrosphere, and lithosphere
- Connecting Earth processes to observable classroom-lab phenomena
Domain 10: Science Learning, Instruction and Assessment (5%)
Though the smallest domain, it's the one most likely to trip up candidates who study only science content and skip pedagogy. Questions ask you to apply instructional and assessment principles specifically to science classrooms.
- Selecting instructional strategies that address common science misconceptions
- Aligning formative assessment methods to inquiry-based lessons
- Adapting instruction for diverse learners in a lab setting
Why Physics and Chemistry Decide Your Score
Because Physics and Chemistry are each weighted at 20%, they contribute more to your scaled score than any other single domain - and more than several smaller domains combined. If your undergraduate background is biology-heavy, as is common among science certification candidates, this is exactly where you're most exposed.
Physics content on TExES 236 typically spans mechanics (motion, forces, energy), waves and optics, electricity and magnetism, and thermodynamics - often phrased as applied, classroom-relevant scenarios rather than pure derivation problems. Chemistry content covers atomic structure, periodicity, bonding, stoichiometry, chemical reactions, and solutions. Both domains lean on quantitative reasoning, which is why TEA provides an on-screen scientific calculator along with a periodic table and a definitions and physical-constants reference page during the test - you are expected to use these tools, not memorize every constant.
Key Takeaway
Spend disproportionate study time on Physics and Chemistry relative to their difficulty for you personally - not just their percentage weight. If either subject wasn't part of your degree coursework, budget extra weeks specifically for it.
If you're trying to gauge overall exam difficulty before committing your study calendar, How Hard Is the TExES 236 Exam? discusses where candidates typically struggle across all ten domains, and TExES 236 Pass Rate 2026 puts the difficulty question in context using TEA's own reporting.
Registration, Fees, and Test-Day Mechanics
Before you can register for TExES 236, most candidates need test approval through an eligible educator preparation program or certification route. If you're pursuing certification through the Post-Admission Content Test (PACT) option, note that PACT candidates follow a separate pre-admission process rather than the standard approval pathway - confirm which route applies to you before scheduling. The TExES 236 Requirements guide covers eligibility routes in detail.
Once approved, you'll register through Pearson and pay the $116 exam fee. On test day, plan around the full 5-hour appointment window: a 15-minute tutorial and compliance agreement come first, then you get 4 hours and 45 minutes for the 140 selected-response questions themselves. Arrive with a clear head for the Physics and Chemistry calculations early, since fatigue late in a nearly 5-hour appointment is real.
After passing, keep the bigger certification picture in mind: Texas standard classroom teacher certificates are valid for 5 years and require 150 continuing professional education hours for renewal. Passing TExES 236 is a milestone, not the finish line, in maintaining an active Texas science teaching certificate. For a full cost picture beyond the test fee itself, see the TExES 236 Certification Cost breakdown.
A Domain-Weighted Study Timeline
Rather than studying domains in the order TEA lists them, allocate time proportional to weight and to your personal weak spots. Use short, focused review blocks rather than marathon sessions - 45-60 minutes per topic with a practice-question check at the end works better than passive rereading, especially for calculation-heavy Physics and Chemistry material.
Physics and Chemistry Foundations
- Review mechanics, energy, and electricity/magnetism basics
- Work through atomic structure, bonding, and stoichiometry problems
- Practice using the on-screen calculator and periodic table under timed conditions
Scientific Inquiry, Earth Systems, and Solar System
- Drill experimental-design scenarios for Domain 1
- Cover plate tectonics, rock cycles, and Earth-sphere interactions for Domain 8
- Review solar system components and universe-scale concepts for Domain 9
Life Science Cluster
- Cell structure and processes (Domain 4)
- Heredity and evolution (Domain 5)
- Diversity of life and environmental interdependence (Domains 6-7)
Pedagogy and Full-Length Practice
- Study science-specific instruction and assessment principles (Domain 10)
- Take full-length timed practice tests to build 4-hour-45-minute stamina
- Review missed items by domain, not just by question number
This timeline is a starting framework, not a rigid mandate - adjust the weeks devoted to Physics and Chemistry if those subjects are genuinely new to you. The full TExES 236 Study Guide expands on each week with specific concept checklists, and a condensed version of high-yield facts across all ten domains is available in the TExES 236 Cheat Sheet for final-week review. You can also run timed sections on our practice test platform to simulate the actual pacing before test day.
Who Hires TExES 236-Certified Teachers
Passing TExES 236 qualifies you to teach science across grades 7 through 12, which opens roles in middle school integrated science classes as well as dedicated high school Biology, Chemistry, Physics, and Earth Science courses. Texas public school districts require this certification (or an equivalent approved route) for secondary science teaching positions, and demand tends to track broader statewide teacher-shortage patterns in STEM subjects specifically.
If you're weighing whether the credential is worth the preparation investment, Is the TExES 236 Certification Worth It? lays out the return-on-investment picture, and the TExES 236 Salary Guide covers earnings context for certified science teachers. For candidates further along in the job search, TExES 236 Jobs and the TExES 236 Training resource page round out the practical next steps after certification.
Where First-Time Candidates Lose Points
TEA's 2024-2025 statewide best-attempt report shows 790 test takers with a 63% pass rate for this exam - a figure that reflects real difficulty, not an exam designed to be easy to clear on a first try. A few recurring patterns show up among candidates who don't pass on their first attempt:
- Treating Physics and Chemistry as equal-weight afterthoughts. At 20% each, under-preparing for either domain has an outsized effect on your scaled score.
- Skipping the pedagogy domain. Domain 10 is only 5%, but candidates who assume "I already teach, I know this" often miss items that test specific instructional-strategy alignment.
- Ignoring the provided reference tools until test day. The on-screen periodic table, calculator, and constants page are helpful only if you've practiced navigating them beforehand.
- Under-practicing stamina for a near-5-hour appointment. Fatigue in the final third of the test affects accuracy on later Earth Science and Solar System questions.
Frequently Asked Questions
The exam has 140 selected-response questions, though some administered forms may include unscored field-test questions embedded within that total.
You need a scaled score of 240. This is not a raw percentage-correct score, so focus your prep on mastering each domain rather than trying to calculate a "safe" number of missed questions.
Physics and Chemistry, since each is weighted at 20% and together make up 40% of the exam - more than any other domain pair on the test.
The appointment window is 5 hours total, including a 15-minute tutorial and compliance agreement, leaving 4 hours 45 minutes of testing time for the 140 questions.
Yes. An on-screen scientific calculator, a periodic table, and a definitions and physical-constants reference page are all provided during the exam.