Praxis Biology: Content Knowledge (5236)

What is it?

What exactly is the Praxis Biology: Content Knowledge (5236)?

Praxis Biology: Content Knowledge (5236) — Education & Teaching credential from ETS

Secondary biology licensure test covering cells, genetics, evolution, organisms, ecology, and scientific inquiry and laboratory safety. Offered by ETS, it is designed for candidates who need to demonstrate verified competence in the Education & Teaching field. The credential is commonly used for career entry, advancement, regulatory compliance, or employer requirements. Candidates should review the official handbook for eligibility, exam format, and scoring before registering.

The path in brief

1. Confirm you meet any eligibility or prerequisites
2. Review the official handbook and study materials
3. Register and pay through the awarding body or authorized provider
4. Schedule and take the exam (test center or online proctoring)
5. Receive your score and, if passed, your credential

Before you book

Who is eligible to sit the Praxis Biology: Content Knowledge (5236)?

Eligibility varies; many credentials are open to all, while others require coursework, work experience, or sponsorship.

Who it is for: Professionals and candidates seeking to validate Education & Teaching competence.

The test itself

What is the format of the Praxis Biology: Content Knowledge (5236)?

The Praxis Biology: Content Knowledge (5236) is administered by ETS and runs 2.5 hours (verify current) and contains 150 questions (verify current) questions.

The fine print

What are the retake and renewal rules for the Praxis Biology: Content Knowledge (5236)?

Proctoring & delivery

HiSET is offered in three ways: paper-based at a test centre, computer-based at a test centre and HiSET@Home under live online proctoring, with availability depending on the state. Calculators and formula sheets are supplied at test centres. The full battery in English or Spanish is permitted, and several states allow candidates to mix languages across subtests.

Retake policy

Retake rules are set per state, but a common pattern allows three attempts per subtest in a calendar year, sometimes extending to six. Several states use a favourable pricing structure in which the full fee is charged only on the first and fourth attempts while the second and third cost only the test centre or proctor fee.

Score reporting

Each of the five subtests is scored 1 to 20. To pass you must score at least 8 on every subtest, at least 2 out of 6 on the Language Arts Writing essay, and at least 45 out of 100 in total across the five. A score of 15 or higher on a subtest is treated as HiSET honours-level performance in several states.

Recertification

The credential a state issues on the strength of a passing HiSET battery is permanent and needs no renewal. Passing subtest scores are carried forward within a state-defined window while you complete the remaining subjects.

Refunds & rescheduling

Refund and reschedule windows are administered by PSI and vary by state and test centre; most centres require cancellation at least 24 hours before the appointment. Registering by phone rather than online attracts an additional fee in some states.

What it pays

How much does this credential pay?

$64,580 median for high school teachers (BLS, May 2024) — and Praxis Biology is the licensure gate, not the pay driver, for secondary science teaching

The Praxis Biology: Content Knowledge (5236) exam is the subject-matter licensure test many states use for secondary biology or life science teacher certification, so the salary story is the occupation it gates: high school teachers (SOC 25-2031), who earned a median of $64,580 in May 2024 per the BLS Occupational Outlook Handbook. The honest framing is that the exam does not itself raise salary — teacher pay is set by state and district salary schedules based on years of experience and education level — but it is a non-negotiable step in the licensure that makes the job available at all in states that require it. The wage distribution: the lowest 10 percent of high school teachers earned under $47,330, and the highest 10 percent more than $104,670, with the spread driven by geography, district, and education level rather than by certification. Public elementary and secondary schools paid a median of $66,930, while private schools paid $60,130. BLS projects a 2 percent employment decline for high school teachers from 2024 to 2034 — driven by projected declines in the school-age population — but that projection sits against roughly 66,200 openings a year, almost all replacement need, and science teaching in particular is a persistent shortage area in many states, which can improve hiring odds for qualified biology candidates. The practical economics for a candidate are simple: the exam costs $130, requires a few weeks of content review, and unlocks a career with a median near $65,000, strong benefits, and a 10-month school year — a favourable return on a modest, mostly self-study investment, especially in states with shortage incentives for science teachers.

Job growth.BLS projects a 2% decline for high school teachers 2024-34 with ~66,200 replacement openings a year; science teaching is a persistent shortage area in many states.

Source: BLS Occupational Outlook Handbook — High School Teachers

Your schedule

How long should I study for it?

50-80 hours over 6-10 weeks of focused study

Plan for six to ten weeks and 50 to 80 hours of study for Praxis Biology 5236, and understand that this is a content-depth exam, not a teaching-methods exam — you are being tested on biology knowledge a beginning teacher must command, not on lesson planning. The exam is 150 selected-response questions in 2.5 hours, computer-delivered, with a state-set passing score typically around 150 on the 100-200 scale. The five published content categories are Nature and Impact of Science and Engineering (13 percent), Cell Biology: Cell Structure and Function (22 percent), Genetics and Evolution (26 percent), Diversity of Life and Organismal Biology (20 percent), and Ecology: Organisms and Environments (19 percent). More than 40 percent of questions integrate Science and Engineering Practices, and roughly 25 percent apply content within teaching scenarios, so a share of your preparation must be applied reasoning, not just recall. Weeks one through four should build each category in order, weighted by percentage — Genetics and Evolution plus Cell Biology are nearly half the paper. Week five should target the Science and Engineering Practices and teaching-scenario question styles, which are the part of the exam candidates least expect. Weeks six through eight should be practice-test heavy, with full-length timed exams and re-study of any category scoring below 80 percent. Week nine is review and logistics. The exam is offered frequently at test centres and at home, so schedule at a point that gives you the full nine weeks, then back the date in from there.

1. Weeks 1-214-18 hrs

   Genetics and Evolution (26%)

   • Study the official ETS Study Companion content topics and map them to your knowledge
   • Cover DNA/RNA and protein synthesis, chromosomes, mutations, and Mendelian and non-Mendelian genetics
   • Work population genetics, natural selection, mechanisms of evolution, and evidence for evolution
   • Practise moving from genotype to phenotype and from evidence to evolutionary explanation
2. Weeks 3-414-18 hrs

   Cell Biology (22%) and organismal biology (20%)

   • Cell biology: macromolecules, enzymes, photosynthesis and cellular respiration, organelles, membrane transport, and the cell cycle
   • Diversity of life: taxonomy, classification, and characteristics across plants, animals, fungi, protists, and prokaryotes
   • Cover plant structure and function, human organ systems, and organismal physiology
   • Connect structure to function — the exam frames many items as structure-function relationships
3. Week 510-12 hrs

   Ecology and nature of science

   • Ecology (19%): populations, communities, ecosystems, biomes, biogeochemical cycles, energy flow, and human impacts
   • Nature and impact of science (13%): experimental design, data analysis, lab safety, and engineering applications
   • Practise interpreting data tables, graphs, and experimental results
   • Work the SEP question style — asking questions, constructing explanations, and analysing data
4. Week 68-10 hrs

   Teaching scenarios and applied items

   • Study the Tasks of Teaching Science section in the Study Companion
   • Practise questions that apply biology content within instructional or assessment scenarios
   • Review the possible selected-response formats: single choice, multiple select, and others
   • Work the official sample questions and answers
5. Weeks 7-812-16 hrs

   Timed full exams and gap closing

   • Take at least two full-length 2.5-hour practice exams
   • Re-study every content category scoring below 80%
   • Re-drill genetics and cell biology — nearly half the paper
   • Practise pacing: 150 questions in 2.5 hours is about a minute per question
6. Week 96-8 hrs

   Review and logistics

   • Final pass over the highest-weight categories and your miss log
   • Confirm your state’s passing score on the ETS state-requirements page
   • Confirm the test date, delivery method, and ID requirements
   • Rest before the exam

What to buy

Which study resources are worth paying for?

Praxis 5236 preparation is inexpensive, and the official material is the anchor. The ETS Study Companion is free and contains the content topics, sample questions, and answers — it is the only resource written to the current blueprint, and it should be your first and primary purchase, which costs nothing. ETS also sells an interactive practice test (typically around $20) that mirrors the format, and that is the best-value paid resource for format calibration. Third-party options are plentiful: study guides from the major test-prep publishers run $25-45 in print with companion question banks, video courses run $15-60 during sales, and full courses can run higher, but for a content exam that rewards breadth and applied reasoning, a structured third-party guide is a pacing aid, not a requirement. The exam itself costs $130 at registration. The honest budget for most candidates is under $200: the free Study Companion, one $20 ETS practice test, one third-party guide, and the exam fee. The buying rule is simple — official first, one timed practice test second, third-party guides as structured supplements — and the resource that cannot be bought is the 50-80 hours of content review itself, which is the actual determinant of the result.

Prices checked 2026-08 in USD and approximate; third-party pricing varies with promotions. ETS does not publish pass rates or license current exam items to third parties. We do not rank by commission.

What you'll face

What question types will I see?

The Praxis Biology 5236 exam consists of 150 selected-response questions completed in 2.5 hours, computer-delivered at a test centre or at home, with a state-set passing score typically around 150 on the 100-200 scaled range. The selected-response format includes single-selection multiple choice, multiple-select items, and other formats such as numeric entry and drag-and-drop, all drawn from the five published content categories: Nature and Impact of Science and Engineering (13 percent), Cell Biology: Cell Structure and Function (22 percent), Genetics and Evolution (26 percent), Diversity of Life and Organismal Biology (20 percent), and Ecology: Organisms and Environments (19 percent). A defining structural feature is that more than 40 percent of questions integrate one or more Science and Engineering Practices, and approximately 25 percent apply content within teaching scenarios and instructional tasks. The samples below are editor-written illustrations of the published content and question styles, not live exam items. The practical pacing implication is about a minute per question, which rewards answering confidently on the recall items so the applied and scenario items get the deliberation they need.

Samples are editor-written illustrations of the published content and question styles, not live exam items.

Reference

What are the key facts about the Praxis Biology: Content Knowledge (5236)?

Praxis Biology: Content Knowledge (5236) is a exam credential; awarded by ETS; the exam fee is ~$130; typical preparation is 60-80 hours over 6-8 weeks; holders typically earn $40,000-$85,000 (25-2031 median $64,580).

In short

Is the Praxis Biology: Content Knowledge (5236) worth it?

• Praxis Biology: Content Knowledge (5236) is awarded by ETS.
• Validates job-ready competence in Education & Teaching.
• Registration is through the awarding body or an authorized test provider.
• Renewal and retake policies vary — confirm before scheduling.

Worth comparing

How does the Praxis Biology: Content Knowledge (5236) compare with similar credentials?

• TOEFL iBT ETS
• TOEIC Listening and Reading Test ETS

Trust

Where does this information come from?

Everything above is taken from the awarding body's own published material. Fees, question counts and domain weights are revised regularly — check the official page before you pay.

• ETS Awarding body

Research confidence: medium · Last reviewed 2026-08