- You need EPP or TEA approval before you can even register for TExES 238.
- The exam costs $116 and covers 100 selected-response questions in a 5-hour appointment.
- A passing score is 240 on a 100-300 scale - no shortcuts around that number.
- Classroom certification also requires passing the PPR EC-12 (160) pedagogy exam.
Who Approves You to Test
Unlike walk-up-and-register exams, TExES Life Science 7-12 (238) requires a gatekeeper. You cannot simply pay $116 and book a Pearson VUE seat. Texas requires that you first be approved to test - either through an educator preparation program (EPP) you're enrolled in, such as a university certification program or alternative certification provider, or directly by the Texas Education Agency (TEA) if you're pursuing certification through a different route recognized by the state.
This approval step exists because TExES 238 is one piece of a larger certification process governed by TEA and the State Board for Educator Certification. The exam itself is developed and administered by Pearson (Evaluation Systems), but Pearson doesn't decide who's eligible - your EPP or TEA does. If you're unsure whether you qualify, your first move should be confirming enrollment status with your program advisor, not registering on the testing vendor's site.
The Eligibility Path Step by Step
Qualifying for TExES 238 generally follows this sequence:
- Enroll in an approved pathway. This is typically a university-based EPP, a post-baccalaureate alternative certification program, or a TEA-recognized route into secondary science teaching.
- Get approved to test. Your EPP submits your eligibility to TEA, or TEA approves you directly depending on your pathway. This unlocks your ability to register.
- Register with Pearson VUE. Once approved, you schedule your computer-administered test (CAT) appointment at a Pearson VUE center in Texas or elsewhere, by appointment, year round.
- Pay the $116 exam fee. There are no member or non-member pricing tiers - everyone pays the same rate.
- Sit for the exam and receive your score. Scores post at 10:00 p.m. Central on the published score report date.
- Complete the PPR EC-12 (160). A first Texas classroom certificate requires this pedagogy exam in addition to your content exam.
If any of this feels unclear relative to your specific situation, the broader overview at What Is TExES 238? and the certification-specific breakdown at TExES 238 Certification can help you confirm you're looking at the right pathway before you invest time.
Key Takeaway
Confirm your EPP or TEA approval status before scheduling anything with Pearson VUE - this single step determines whether you can register at all.
Registration, Fees & Retake Rules
Once approved, the logistics are fairly straightforward but carry a few details candidates often overlook:
- Fee: $116 flat, no tiered pricing.
- Registration validity: Your registration window is valid for 170 days, so don't register far in advance of when you're actually ready to test.
- Withdrawal refunds: If you withdraw, you get the exam fee back minus a $25 processing charge.
- Retake limits: You're allowed five attempts total, with a mandatory 30-day wait between each attempt. Need a sixth try? You'll need a TEA test-limit waiver.
- Passing score: 240 on a 100-300 scale, applied uniformly regardless of how many scored versus field-test items you happened to receive.
Full pricing context - including how the $116 fee fits into total certification costs across EPP tuition, the PPR exam, and fingerprinting - is covered in TExES 238 Certification Cost 2026: Complete Pricing Breakdown. If you want the exact scoring mechanics explained in more depth, see TExES 238 Passing Score 2026: Exactly What You Need to Pass.
Exam-Day Format and Logistics
Knowing the eligibility rules only gets you to the test center. What happens once you're there is its own requirement to prepare for:
- Total appointment time: 5 hours - 15 minutes for the CAT tutorial and compliance agreement, plus 4 hours 45 minutes of actual testing.
- Question count: 100 selected-response questions. Some are unscored field-test items mixed in without being labeled as such, so every question deserves full attention.
- Tools allowed: No calculator and no reference sheet is provided for this exam, meaning formula-based and quantitative genetics or ecology questions must be solved from memory and reasoning.
- Delivery format: Computer-administered at Pearson VUE centers, in Texas and nationwide by appointment.
Because there's no scratch reference sheet, candidates who breeze through Punnett square ratios, dihybrid crosses, or Hardy-Weinberg-style reasoning without a calculator crutch tend to move faster through Domain 3. For a deeper look at how demanding the format actually is relative to other certification exams, read How Hard Is the TExES 238 Exam? Complete Difficulty Guide 2026.
Content Prerequisites: What You Must Already Know
Eligibility isn't just administrative - TEA also expects you to arrive with a working command of the six domains built from the 2019 Life Science 7-12 exam framework. That framework defines 20 competencies aligned to Life Science 7-12 Standards I-XI and the Texas Essential Knowledge and Skills (TEKS). Three domains tie for the heaviest weight at 20% each, meaning roughly 60 of the 100 questions come from just these three areas:
Domain 2: Cell Structure and Processes (20%)
Covers biomolecules, prokaryotic and eukaryotic cell structures, membrane transport and homeostasis, photosynthesis and cellular respiration, and the cell cycle including differentiation.
- Know organelle function well enough to answer scenario-based, not just definitional, questions.
Domain 3: Heredity and Evolution of Life (20%)
Covers DNA and RNA structure, Mendelian and molecular genetics, mutation, natural selection, speciation, and fossil and molecular evidence for evolution.
- Practice cross diagrams and pedigree reasoning without a calculator, since none is provided.
Domain 4: Diversity of Life (20%)
Covers taxonomy, plant and animal systems, homeostasis across taxa, and the biology of behavior.
- Expect comparative questions across kingdoms and phyla rather than isolated fact recall.
The remaining domains - Scientific Inquiry and Processes (15%), Interdependence of Life and Environmental Systems (15%), and Science Learning, Instruction and Assessment (10%) - round out the framework with experimental design, ecosystem dynamics, and pedagogical application of life science content in a 7-12 classroom. A full breakdown of every competency inside all six domains is available in TExES 238 Exam Domains 2026: Complete Guide to All 6 Content Areas.
| Domain | Weight | Core Focus |
|---|---|---|
| Scientific Inquiry and Processes | 15% | Experimental design, lab safety, data interpretation |
| Cell Structure and Processes | 20% | Biomolecules, organelles, transport, respiration/photosynthesis |
| Heredity and Evolution of Life | 20% | Genetics, mutation, selection, speciation, evidence for evolution |
| Diversity of Life | 20% | Taxonomy, plant/animal systems, behavior |
| Interdependence of Life and Environmental Systems | 15% | Ecosystems, energy flow, environmental interactions |
| Science Learning, Instruction and Assessment | 10% | Pedagogy, assessment design, science literacy |
Key Takeaway
Because three domains account for roughly 60% of the exam, mastering Cell Structure and Processes, Heredity and Evolution, and Diversity of Life should be your non-negotiable prerequisite before test day.
After You Pass: PPR, Certification & ECOS
Passing TExES 238 is a prerequisite for certification, not the finish line itself. To earn your first Texas classroom certificate, you also need to pass the PPR EC-12 (160) pedagogy exam. Once both scores clear, your certification is issued as a standard Texas certificate valid for five years, renewed through ECOS with 150 CPE clock hours required for classroom teachers during that renewal cycle.
This is worth planning for early: candidates who treat TExES 238 as an isolated hurdle sometimes forget the PPR exam has its own timeline, fee, and content demands. If you're weighing whether the entire certification path is worth the investment of time and testing fees, Is the TExES 238 Certification Worth It? Complete ROI Analysis 2026 lays out the tradeoffs, and TExES 238 Jobs covers what kinds of secondary science teaching positions this credential opens up.
Mapping Requirements to a Study Timeline
Once eligibility is confirmed and you're registered, the remaining requirement is simply being ready on test day. Given that three domains carry 20% weight each and the exam allows no calculator, a domain-sequenced study plan makes more sense than a generic weekly template.
Cell Structure and Processes
- Drill biomolecule structure, organelle function, and cell cycle regulation
- Practice transport and homeostasis scenarios without notes
Heredity and Evolution of Life
- Work genetics crosses and pedigrees by hand, since no calculator is provided
- Review fossil and molecular evidence for speciation
Diversity of Life
- Build comparison charts across taxonomic groups
- Study behavior biology alongside plant and animal systems
Remaining Domains + Full Practice
- Cover Scientific Inquiry, Environmental Interdependence, and Instruction/Assessment
- Take full-length practice sets timed to the 4 hours 45 minutes testing window
For a more detailed walkthrough of pacing, question strategy, and how to structure review sessions around your registration date, see the TExES 238 Study Guide 2026: How to Pass on Your First Attempt. If timing your registration around available appointments matters to your schedule, check TExES 238 Exam Dates 2026: Testing Windows, Deadlines & Scheduling before locking in a plan. And when you're ready to test your readiness under realistic conditions, running full-length questions on our practice test platform is the most direct way to see where your domain knowledge actually stands.
Key Takeaway
Sequence study by domain weight - spend the most calendar time on the three 20% domains before touching lighter-weighted content areas.
FAQ
Your specific coursework requirements are set by your EPP or TEA pathway rather than by the exam itself. What matters for the exam is command of the 20 competencies across the six domains, which you can review in the full exam domains guide.
No. You must be approved to test either by an educator preparation program or directly by TEA before you can register with Pearson VUE.
You get five attempts, with a required 30-day wait between each. Beyond five attempts, you need a TEA test-limit waiver to try again.
No. A first Texas classroom certificate also requires passing the PPR EC-12 (160) pedagogy exam alongside your content exam.
You receive a refund of the exam fee minus a $25 processing charge, and your original 170-day registration validity no longer applies once withdrawn.