- Who Actually Needs to Take TX PACT 738
- Eligibility Requirements and Prerequisites
- The GPA and Credit-Hour Thresholds
- Registration, Scheduling, and the 170-Day Window
- Exam Format and Domain Breakdown
- Fees and What You're Actually Paying For
- Retake Rules and the Five-Attempt Limit
- Building a Requirements-Driven Prep Timeline
- After You Pass: What TX PACT 738 Does and Doesn't Do
- Frequently Asked Questions
- PACT admission is required if your GPA is below 2.5 or you have fewer than 15 relevant subject-area credits.
- You must hold a bachelor's degree or be in your final semester, plus a TEA ID, to sit for TX PACT 738.
- The exam has 125 selected-response questions, a 240 passing scaled score, and a $106 base fee.
- You have 170 days from registration to schedule and take the test.
Who Actually Needs to Take TX PACT 738
TX PACT: Life Science: Grades 7-12 (738) is a pre-admission content test administered through the Texas Education Agency (TEA) and delivered by Pearson at Pearson VUE test centers. It isn't a teaching certification exam by itself - it's a gatekeeping tool that Educator Preparation Programs (EPPs) use to decide whether a candidate is academically ready to enter a life science teacher preparation track for grades 7-12. If you're wondering exactly what this credential is and how it fits into the broader certification pathway, our overview of what TX PACT 738 is lays out the basics in plain language.
Not everyone pursuing life science certification needs this test. Whether you're required to sit for it comes down entirely to your academic record at the time you apply to an EPP - which is why the eligibility rules below matter more than generic "how to study" advice.
Eligibility Requirements and Prerequisites
Before you can register for TX PACT 738, you need to meet baseline eligibility set by TEA for EPP-admission or transfer candidates:
- A completed bachelor's degree, or documented final-semester standing in a bachelor's degree program
- A valid TEA ID number, which ties your testing history to your official educator record in ECOS
These two items are non-negotiable. Pearson VUE test centers will not seat you for the exam without a TEA ID linked to your registration, and EPPs will not process your PACT results without one either. If you haven't generated a TEA ID yet, that should be your very first administrative step - well before you start reviewing content in a TX PACT 738 study guide.
Key Takeaway
Get your TEA ID set up early. It's a small bureaucratic step, but it can quietly delay your registration timeline if you leave it until the last minute.
The GPA and Credit-Hour Thresholds
This is the part of TX PACT 738 requirements that trips people up most. PACT for EPP admission is required specifically when a candidate falls into one of these two situations:
- Cumulative GPA below 2.5, or
- Fewer than 15 semester credit hours in the relevant subject area (life science content)
If either condition applies to you, most Texas EPPs will require a passing TX PACT 738 score as a condition of admission - it becomes your way of demonstrating content mastery when your transcript alone doesn't make the case. Individual EPPs may also layer on additional internal requirements beyond the state minimum, so it's worth confirming directly with your specific program rather than assuming state rules are the whole picture.
Why This Threshold Exists
The GPA and credit-hour thresholds function as a screen: candidates with strong academic records in the subject area are presumed content-ready, while those below the line need to demonstrate competency through a standardized exam instead.
- Below 2.5 GPA overall triggers the requirement
- Fewer than 15 relevant semester credits triggers the requirement
- EPPs can add stricter local requirements on top of these
Registration, Scheduling, and the 170-Day Window
Once you're eligible and have registered for TX PACT 738, you don't have unlimited time to sit for the exam. You must schedule and take the test within 170 days of your registration date. That window sounds generous, but if you register early and then let months slip by without a study plan, you can end up cramming in the final weeks - which is a worse position than pacing yourself from the start.
Testing itself is available year-round by appointment, both in Texas and at Pearson VUE locations nationwide, which gives out-of-state candidates and those relocating flexibility that fixed testing windows don't. For a closer look at how appointment availability actually works throughout the year, see our breakdown of TX PACT 738 exam dates, testing windows, and deadlines.
Exam Format and Domain Breakdown
TX PACT 738 is a computer-administered exam consisting of 125 selected-response questions. Some unscored field-test items may be mixed in to help TEA and Pearson calibrate future forms, but you won't know which questions those are, so every question deserves your full attention. You're given 3 hours of actual testing time, with a total appointment length of 3 hours 15 minutes once you add the 15-minute tutorial and compliance agreement at the start. An on-screen scientific calculator is provided, so you don't need to bring your own.
To pass, you need a scaled score of 240. For a full explanation of how scaled scoring works and what that number actually represents, check our dedicated page on the TX PACT 738 passing score.
Content is organized into five domains and 15 competencies, with weights that are approximate:
| Domain | Approximate Weight |
|---|---|
| Genetics and Evolution | 27% |
| Nature of Science | 20% |
| Biological Unity and Diversity | 20% |
| Ecology and Environment | 20% |
| Biochemistry and Cell Biology | 13% |
Genetics and Evolution is the single largest domain by a clear margin, which means candidates should not treat all five domains as equally weighted when allocating study time. For a competency-by-competency walkthrough of each domain, our complete guide to all 5 content areas goes deeper than a surface-level list.
Domain 3: Genetics and Evolution (27%)
The largest domain on the exam, covering heredity mechanisms, molecular genetics, population genetics, and evolutionary theory at a depth appropriate for teaching 7-12 grade students.
- Mendelian and non-Mendelian inheritance patterns
- Natural selection and evidence for evolution
- Molecular basis of heredity and gene expression
Domain 1: Nature of Science (20%)
Focuses on scientific inquiry, experimental design, and how science as a discipline generates and validates knowledge - foundational for any secondary science teacher, not just life science specialists.
- Designing valid, controlled experiments
- Interpreting data and identifying sources of error
- Understanding the limits and nature of scientific claims
Fees and What You're Actually Paying For
The base exam fee for TX PACT 738 is $106. That fee covers your seat at a Pearson VUE test center, the 3-hour-15-minute appointment, and the score report that gets posted to ECOS for your EPP to review. It does not automatically include retake costs - each additional attempt requires its own registration and fee. If you're mapping out the full financial picture before you commit, our complete pricing breakdown walks through what to budget for beyond just the base fee.
Key Takeaway
Budget for the $106 base fee as a baseline, but plan your study schedule assuming you'll only pay it once - retakes cost you both money and at least 30 additional days.
Retake Rules and the Five-Attempt Limit
If you don't pass on your first try, Texas testing policy requires at least 30 days between attempts, and your prior results must be posted to ECOS before you can register again. If you're testing as part of an affiliated EPP, you'll also need EPP retest approval before scheduling another appointment - this isn't something you can bypass by registering independently.
There's an important nuance around attempt limits: PACT taken for EPP admission or for charter-school assignment purposes is exempt from the standard five-attempt limit that applies to many other Texas educator exams. However, intensive pre-service candidates remain subject to that five-attempt cap. Knowing which category you fall into matters before you start treating retakes casually.
Given the historical statewide best-attempt pass rate of 33% among 101 test takers for the September 2024-August 2025 program year, treating your first attempt as your best and possibly only shot is the smarter mindset. For more context on that number and what it implies about difficulty, see our analysis of the TX PACT 738 pass rate data and our broader look at how hard the TX PACT 738 exam actually is.
Building a Requirements-Driven Prep Timeline
Because Genetics and Evolution carries the most weight at 27%, and Nature of Science, Biological Unity and Diversity, and Ecology and Environment each sit around 20%, a sensible prep sequence front-loads the heaviest domain early, while it's still fresh, and treats Biochemistry and Cell Biology at 13% as important but not the top priority for time allocation.
Genetics and Evolution
- Review heredity, molecular genetics, and evolutionary theory competencies
- Work through practice questions targeting this domain specifically
Nature of Science + Biological Unity and Diversity
- Cover experimental design and data interpretation
- Study classification, taxonomy, and organismal diversity
Ecology and Environment
- Focus on ecosystems, energy flow, and human impact topics
Biochemistry and Cell Biology + Full Review
- Cover cellular processes and biochemical pathways
- Take a full-length practice run under timed conditions
If you want a condensed reference to keep alongside your notes in the final days before your appointment, our one-page review of must-know facts is built for exactly that kind of last-mile review. You can also run through full practice questions on our practice test platform to gauge how close you are to the 240 scaled score threshold before you commit to a test date.
After You Pass: What TX PACT 738 Does and Doesn't Do
It's worth being precise about what a passing TX PACT 738 score actually accomplishes. Passing satisfies the content-readiness requirement for EPP admission - it does not, on its own, make you a certified Texas teacher. Certification is a separate, later process that involves completing your EPP, additional testing, and other TEA requirements. Understanding this distinction early helps you set realistic expectations about your overall timeline into the classroom.
Because PACT scores feed into EPP decisions rather than directly into hiring, it's also worth thinking ahead about how this credential connects to job prospects and long-term career value. Our pages on TX PACT 738 jobs, the salary guide, and whether the credential is worth pursuing from an ROI perspective go into that side of the picture in more detail. If you're still clarifying terminology - what the acronym stands for, how it differs from full certification, or what "PACT" actually means in this context - our explainer pages on TX PACT 738 meaning and what TX PACT 738 stands for can clear that up quickly.
For candidates who want structured coaching rather than self-study alone, it's also worth exploring TX PACT 738 training options before your registration clock starts running. And if you're building your prep plan around practice testing as your primary study method, starting that process a few weeks before you even register can give you a realistic read on where your content gaps actually are.
Frequently Asked Questions
No. It's only required for EPP admission or transfer candidates whose GPA is below 2.5 or who have fewer than 15 relevant subject-area semester credits. Candidates who meet the academic thresholds may not need it at all, though individual EPPs can add their own requirements.
You need a bachelor's degree or final-semester standing in a degree program, plus a valid TEA ID. These are baseline requirements set by TEA for EPP-admission and transfer candidates before Pearson VUE will schedule your appointment.
You must schedule and take TX PACT 738 within 170 days of registration. Testing appointments are available year-round in Texas and nationwide through Pearson VUE, but the 170-day clock does not pause.
PACT taken for EPP admission or charter-school assignment purposes is exempt from the standard five-attempt limit that applies to other Texas educator exams. However, intensive pre-service candidates remain subject to that five-attempt cap, so your specific pathway determines the rule that applies to you.
You must wait at least 30 days between attempts, and your prior score must be posted to ECOS before you can register again. Affiliated candidates also need EPP retest approval before scheduling another sitting.