2.5 Pedagogy: Teaching Inquiry-Based Biology
Key Takeaways
- The 5E instructional model sequences a lesson into Engage, Explore, Explain, Elaborate, and Evaluate phases, with student inquiry preceding the teacher's formal explanation.
- NGSS three-dimensional learning interlocks Disciplinary Core Ideas (DCIs), Science and Engineering Practices (SEPs), and Crosscutting Concepts (CCCs) in every performance expectation.
- Formative assessment is feedback for learning (during the unit); summative assessment is evaluation of learning (end of unit). Both are essential, and the labels describe purpose, not the tool.
- Common biology misconceptions include 'tree mass comes from soil,' 'evolution is goal-directed,' and 'organisms acquire traits through use and inheritance' - each must be elicited and confronted rather than ignored.
- Universal Design for Learning (UDL) principles - multiple means of representation, action and expression, and engagement - make biology accessible to English learners, students with IEPs, and students with sensory or mobility differences.
Why This Section Matters
The Praxis Biology Content Knowledge test (5236) embeds pedagogy questions throughout the Nature of Science subarea. ETS wants evidence that you can plan and run an inquiry classroom, not merely lecture content. Expect scenario stems that describe a student question, a misconception, or a lesson constraint, and ask which next teacher move is best.
The 5E Instructional Model
Developed by the Biological Sciences Curriculum Study (BSCS) in 1987, the 5E model sequences inquiry so that students explore phenomena before the teacher names them.
| Phase | Teacher Move | Example for a Photosynthesis Lesson |
|---|---|---|
| Engage | Hook curiosity, surface prior knowledge | Show a time-lapse of a sapling growing 30 cm and ask, "Where did this new mass come from?" |
| Explore | Provide a hands-on or data-rich experience without yet supplying the answer | Students use elodea and bromothymol blue to detect CO2 uptake at different light intensities |
| Explain | Introduce vocabulary and formal models AFTER students have data | Teacher names photosynthesis equation; students attach observations to chloroplasts, stomata, light reactions |
| Elaborate | Apply the concept to a new context | Students predict what happens to forest mass on a planet with twice the atmospheric CO2 |
| Evaluate | Assess understanding (often blended throughout, not only at the end) | Exit-ticket question + lab report rubric + targeted summative item |
The central feature is that Explore precedes Explain. Praxis stems frequently offer a tempting wrong answer that says, "First, lecture on the chloroplast," — the correct 5E choice is to elicit and explore before explaining.
NGSS Three Dimensions
The Next Generation Science Standards (NGSS, 2013) define every performance expectation in three interlocking dimensions:
- Disciplinary Core Ideas (DCIs) - the content. In biology these are organized under LS1 (From Molecules to Organisms), LS2 (Ecosystems), LS3 (Heredity), and LS4 (Biological Evolution).
- Science and Engineering Practices (SEPs) - the 8 practices: (1) Asking questions, (2) Developing and using models, (3) Planning and carrying out investigations, (4) Analyzing and interpreting data, (5) Using mathematics and computational thinking, (6) Constructing explanations, (7) Engaging in argument from evidence, (8) Obtaining, evaluating, and communicating information.
- Crosscutting Concepts (CCCs) - 7 themes that span all sciences: Patterns; Cause and effect; Scale, proportion, and quantity; Systems and system models; Energy and matter; Structure and function; Stability and change.
A performance expectation bundles one element of each dimension. For example, HS-LS2-7: Design, evaluate, and refine a solution for reducing the impacts of human activities on the environment and biodiversity requires DCI knowledge of ecosystem dynamics (LS2), the SEP of constructing solutions, and the CCC of stability and change.
Formative vs. Summative Assessment
Assessment terminology trips up teacher candidates because the same tool can serve either purpose; what matters is what you do with the information.
| Feature | Formative | Summative |
|---|---|---|
| Purpose | To inform teaching while learning is in progress | To evaluate learning after instruction is complete |
| Stakes | Low | High (grades, certification) |
| Timing | Frequent, embedded | End of unit, semester, course |
| Examples | Exit tickets, think-pair-share, mini-whiteboards, lab probing questions, draft lab reports | Unit tests, final exams, end-of-year state tests, lab practicals |
A quiz used at the end of a unit to assign a grade is summative. The same quiz, given mid-unit and used to decide which topic to reteach tomorrow, is formative.
Diagnostic Assessment
A related category, diagnostic assessment, is given before instruction to identify what students already know and which misconceptions are present. Strategies include K-W-L charts, concept inventories such as the Conceptual Inventory of Natural Selection (Anderson, Fisher, and Norman, 2002), and structured pre-tests.
Common Student Misconceptions
Misconceptions are not random errors — they are coherent alternative models students bring into class. Effective teaching identifies, confronts, and replaces them.
| Domain | Misconception | What the Evidence Shows |
|---|---|---|
| Plant biology | A tree gains mass mostly from the soil | About 90% of dry mass comes from atmospheric CO2 fixed by photosynthesis; soil contributes mostly water and trace minerals (Helmont, 1648; modern isotopic studies). |
| Evolution | Evolution is goal-directed; organisms evolve traits because they need them | Natural selection acts on existing random variation; mutations are not produced on demand. |
| Genetics | Acquired traits are inherited | DNA is inherited; learned behaviors and acquired injuries are not. Epigenetic effects can persist briefly but are not the same as Lamarckian inheritance. |
| Cells | Cells are flat, two-dimensional shapes like in the textbook diagram | Cells are three-dimensional; many are highly polarized and motile. |
| Energy flow | Energy is recycled in an ecosystem like matter | Energy flows one way and is degraded as heat at every trophic transfer (Second Law of Thermodynamics). |
| Adaptation | Individuals adapt during their lifetime to environmental pressure | Populations evolve over generations; individuals do not 'adapt' genetically. |
A productive classroom move is to elicit the misconception (give a low-stakes prompt that surfaces it), then provide a discrepant event (an observation that conflicts with the misconception), then co-construct a revised explanation rooted in the evidence.
Accommodations and Universal Design
Universal Design for Learning (UDL) asks teachers to plan for variability from the start rather than retrofit accommodations.
- Multiple means of representation - present content as text, diagram, video, and physical model; provide vocabulary support and translated glossaries for English learners.
- Multiple means of action and expression - let students demonstrate knowledge through writing, oral explanation, lab demonstration, concept maps, or video; allow speech-to-text for dysgraphia; provide adapted tools for fine-motor differences.
- Multiple means of engagement - vary task choice, build relevance to student communities, use peer collaboration with explicit roles.
Individualized Education Programs (IEPs) and 504 Plans are legally binding documents under IDEA and Section 504 of the Rehabilitation Act. Required accommodations in the science lab may include extended time, written lab procedures in advance, a paired lab buddy, alternative seating near eyewash and exits, or modified PPE (e.g., over-the-glasses goggles for students who wear corrective lenses).
Integrating Safety into Lab Planning
A defensible lab plan submitted to a department chair or principal contains:
- Learning objective tied to an NGSS performance expectation and stated in student-friendly language.
- Pre-lab safety briefing with required PPE listed and a quick review of relevant SDS sections.
- Materials list with quantities and an SDS folder accessible during the lab.
- Step-by-step procedure that students can read; hazard moments are flagged with a symbol or color.
- Roles and supervision plan for each lab group; clear escalation path for incidents.
- Clean-up and disposal protocol including sharps containers, biohazard bags for cultures, and chemical waste segregation.
- Accommodations explicitly addressed for any student with an IEP/504 plan, mobility need, sensory difference, or English-language scaffold.
- Assessment identifying which evidence (lab notebook, exit ticket, lab report) you will use formatively or summatively.
ETS expects you to recognize that lab safety is a planning task, not an in-the-moment response. The Praxis correct answer to "what should the teacher do first before this lab?" is almost always "review the SDS, plan the safety briefing, and confirm PPE availability" — not "start the demonstration."
A teacher is planning a 5E lesson on cellular respiration. She has decided to begin with a discrepant event: students compare the mass of a sealed jar with a germinating seed to the same jar after 5 days. According to the 5E model, what should she do IMMEDIATELY after this Engage activity?
After teaching a unit on photosynthesis, a teacher asks students 'Where does most of a tree's dry mass come from?' Forty percent of the class answers 'from the soil.' Which next instructional move best addresses this persistent misconception?