Bright Minds Dissections · Scope & Sequence

The course map.

Eight units — a progressive practice sequence — the labs that anchor them, and the two-day rhythm that runs every week of the semester. This is the planner’s view — the whole course on one page.

The weekly engine

Two days a week, and the work between them.

Every unit runs on the same rhythm: Concept Day → [student works at home] → Experiment Day → [student synthesizes at home] → next Concept Day. One day forces a choice between depth and breadth; two days allow both. More than two crowds out the at-home work where integration actually happens.

The solid path is the school week; the dashed return is the at-home synthesis that carries one week into the next.

Day one · ~2 hours

Concept Day

Arrival & warm-up — reconnect with the prior session
Pre-lecture discussion — surface what the at-home reading raised
Direct instruction — micro-lectures, worked problems, demonstrations
Guided practice — rehearse the technique & the procedure, solo or in pairs
Misconception sweep & wrap-up — correct common errors, preview the lab

Guide's role: Socratic and diagnostic. Student's role: active participation; pre-reading required.

Day two · ~2 hours

Experiment Day

Pre-lab briefing — the question, the procedure, the safety
Safety check — goggles, gloves, sharps & scalpel handling; explicit, every time
Setup — trays, instruments, specimen, partner assignment
Execution — the lab itself; the guide circulates and coaches
Debrief & lab notebook — completed before the student leaves
Cleanup & specimen & sharps disposal — to standard; non-negotiable

Guide's role: safety officer first, teacher second. Student's role: the lab notebook is THE artifact — predictions before results.

The practice sequence

From safety drills to comparative defense.

The sequence builds dissection skills; it is not an evolutionary ladder. The specimens belong on a branching tree, not in a line of ancestors. Click a unit to open the mastery rubric used to assess its practical work.

Each unit assumes the one before it — foundational technique first, comparative synthesis last.

The eight-unit practical sequence. Skill order is not an evolutionary ladder; comparison claims need evidence.

Unit	Big ideas	Anchor lab(s)	Integrates with
01 · Tools, Safety & the Ethics of Dissection	The dissection kit, sharps & scalpel safety, specimen care, and the ethics of using a real specimen	Kit handling, safety & specimen-care drill	The rise of dissection from Vesalius to the modern lab (history, reading); the ethics of specimen use; measuring & sketching to scale
02 · The Earthworm	Segmentation and the annelid body plan; the first internal dissection	Earthworm dissection & segment survey	Cuvier and the founding of comparative anatomy (history, writing); ecology (soil & decomposition); drawing anatomy to scale
03 · The Grasshopper	Arthropod anatomy, the exoskeleton, and mouthpart structure	Grasshopper dissection & mouthpart study	The diversity of the invertebrates (history, reading); entomology; comparing body plans across specimens
04 · The Clam or Squid	The mollusk body plan; soft-bodied anatomy and organ layout	Clam or squid dissection & organ survey	Owen and the naming of “homology” (history, writing); marine biology; mapping organs to function
05 · The Perch	The perch specimen; fins, gills, and a survey of the fish’s organ systems	Perch dissection & fin/organ survey	Vertebrate anatomy (history, reading); ichthyology; comparing a ray-finned fish with tetrapods without assuming identical limb bones
06 · The Frog	Amphibian organ systems; a full survey of vertebrate organs in a familiar specimen	Frog dissection & organ-system survey	The frog as the classic teaching specimen (history, writing); physiology; comparing organ systems across vertebrates
07 · The Fetal Pig	Mammalian organ systems; a mammalian specimen with fetal-versus-adult limits	Fetal-pig dissection & full organ-system survey	Darwin and the homology of tetrapod forelimb bones (pig trotter, human hand); fin-to-limb history needs fossil and DNA evidence (history, reading, writing); mammalian physiology; systematic organ mapping
08 · Comparative Anatomy & the Dissection Defense	Homology, branching common descent, and the limits of cross-specimen comparisons	Comparative-anatomy synthesis & dissection defense	From Cuvier and Owen to Darwin’s tree of life (history, writing); evolutionary biology; the evidence for common descent

Every unit carries the core spokes — History, Reading, and Writing — anchored to the story in the integration guide. The column above names each unit’s distinctive spokes; geography and soft social studies run where they fit, and students pick from elective spokes (data, ethics, economics, technology, art). An applied-math lane runs through every unit too — math used in service of the science, never as a separate program.

The three demonstrations

Where mastery gets proven in person.

Three times across the semester, the student steps up to a demonstration that is hard to fake, outsource, or generate. These are the core of the course — understanding, shown in real time, against a rubric, in front of a guide.

After Unit 07

Dissection defense

Complete a clean dissection and defend every choice — the incision, the technique, and each structure you identify — out loud, under questions.

After Unit 05

Timed structure identification

Locate and name specified structures on a dissected specimen — accurately, and under time pressure.

End of each unit

Oral lab-notebook defense

Walk a guide through your own notebook: the question, the method, the data, the anomalies, the interpretation.

A note on pacing. The eight units run across a single semester — roughly two weeks each. That fills the semester’s ~18 instructional weeks: about 16 weeks of units, with the three demonstrations slotted at the natural seams and a short review-and-buffer window. Mastery-based progression means the calendar bends to the student, not the other way around — a unit is done when it is demonstrated, and the multi-section scheduling guide shows guides how to hold a cohort together when students master at different rates.

Assigned student learning

Open the eight learning pathways for specific source sections, explanations, datasets, leveled practice, public practice answers (not assessment keys), transfer evidence, and approved route boundaries.

Checked public sources

All source links below were fetched for this workstream. They support the tree-not-ladder framing, homology/analogy distinction, animal form/function context, and safety/ethical route boundaries used in the unit lessons.

OpenStax Biology 2e: Organizing Life on Earth. Checked 2026-09-28.
The animal kingdom arranged in conformity with its organization. Checked 2026-09-29.
Aloysii Galvani De viribus electricitatis in motu musculari commentarius. Checked 2026-09-29.
On the Origin of Species. Checked 2026-09-29.
OpenStax Biology 2e: Understanding Evolution. Checked 2026-09-28.
OpenStax Biology 2e: Animal Form and Function. Checked 2026-09-28.
Understanding Evolution: Homologies. Checked 2026-09-28.
Understanding Evolution: Misconceptions about evolution. Checked 2026-09-28.
NSTA Scope on Safety member article teaser: Dissection--Don't cut out safety. Checked 2026-09-28.
NABT: The Use of Animals in Biology Education. Checked 2026-09-28.

Course-depth investigation inventory

This remains Grades 8-12 (semester / lab-skills course). It is not an AP authorization, college-credit promise, or certification claim. The workstream adds 8 source-linked cases, 8 labeled synthetic datasets, 10 numerical calibrations, and explicit image-based, virtual, model, and professionally supervised alternatives.

No improvised procedures, preservatives, latex or other allergens, or instruments are introduced by these public lessons. Hands-on work must follow the educator-approved procedure and SDS, use ethically and legally sourced preserved specimens, and respect opt-out access to an equivalent image-based, virtual, or model route without penalty. No live-animal procedures are part of this course.

Completion evidence across the course: defend a real specimen identification, explain a valid cross-specimen comparison, and state the limits of the evidence. Public worked answers are nonsecure practice; the Unit 08 percentage is a comparison tally, not morphology.

Unit 1: Approved route and safety defense [approved-routes]

Inputs, synthetic data, selected-level tasks, and checked answers. Criteria: Science 1, Science 2, Science 3, Science 4, Science 5.

Sources: NSTA Scope on Safety member article teaser: Dissection--Don't cut out safety; NABT: The Use of Animals in Biology Education.

materials: Use the supplied safety-route-records records, assigned source sections, calculator and an accessible graph or diagram. No physical apparatus is required.

record: Retain approved-routes, the selected level, original inputs and first attempt, source/date, system and axes, units, assumptions, calculation/graph, uncertainty, correction and fresh transfer. Link only to the stated science criteria.

review: An educator reviews prerequisites, source interpretation, reasoning and accessibility before assessment. A paper response does not certify unobserved practical technique; approved hands-on work requires a separate record.

question: Which evidence route is approved before the unit begins, and what kind of evidence can it support?

prerequisites: Knows instrument names, PPE expectations, opt-out rights, and that no live-animal procedures are permitted.

variables: Route type, approval status, observed skill evidence, and conceptual evidence are recorded separately.

controls: Every route uses the same conceptual question and source standard; hands-on technique is never inferred from a paper response.

replication: Audit each route with the same checklist before instruction and again when evidence is submitted.

analysis: Calculate the share of routes with observed practical evidence and identify where a report would overclaim.

Evidence: Completion evidence: the student defends a real specimen identification, explains a valid cross-specimen comparison, and states the limits of the evidence. Safety evidence also includes the chosen route, SDS/preservative/allergen check, legal and ethical source, disposal plan, and whether practical skill was observed.

Unit 2: Earthworm segmentation without ranking animals [earthworm-segmentation]

Inputs, synthetic data, selected-level tasks, and checked answers. Criteria: Science 1, Science 2, Science 4, Science 5.

Sources: OpenStax Biology 2e: Animal Form and Function; OpenStax Biology 2e: Organizing Life on Earth.

materials: Use the supplied earthworm-segments records, assigned source sections, calculator and an accessible graph or diagram. No physical apparatus is required.

record: Retain earthworm-segmentation, the selected level, original inputs and first attempt, source/date, system and axes, units, assumptions, calculation/graph, uncertainty, correction and fresh transfer. Link only to the stated science criteria.

question: How does repeated segmentation help orient and identify the earthworm specimen?

prerequisites: Can orient a bilaterally symmetric specimen and record a measurement with units.

variables: Specimen length, visible segment count, orientation, and preservation condition.

controls: Count only visible rings under the approved procedure; do not infer missing rings from memory.

replication: Repeat the count after rotating the tray and compare with a partner or image-based route.

analysis: Compute visible segments per centimeter and describe why it is only local practice evidence.

Evidence: Completion evidence: the student defends a real specimen identification, explains a valid cross-specimen comparison, and states the limits of the evidence. The student must identify a real earthworm structure and explain what segmentation does and does not prove.

Unit 3: Grasshopper appendages and arthropod variation [grasshopper-appendages]

Inputs, synthetic data, selected-level tasks, and checked answers. Criteria: Science 1, Science 2, Science 4, Science 5.

Sources: OpenStax Biology 2e: Animal Form and Function; OpenStax Biology 2e: Organizing Life on Earth.

materials: Use the supplied grasshopper-appendage-lengths records, assigned source sections, calculator and an accessible graph or diagram. No physical apparatus is required.

record: Retain grasshopper-appendages, the selected level, original inputs and first attempt, source/date, system and axes, units, assumptions, calculation/graph, uncertainty, correction and fresh transfer. Link only to the stated science criteria.

question: Which grasshopper structures can be identified from direct evidence, and where does preservation limit the claim?

prerequisites: Knows arthropod regions, jointed appendages, and external orientation terms.

variables: Appendage pair, side, length, damage note, and identification confidence.

controls: Measure corresponding left-right positions only; do not compare different appendage types as if they were the same part.

replication: Have a second reader verify the side and damage note from the same specimen or image route.

analysis: Compute mean paired asymmetry and classify differences as matching, artifact-limited, or unresolved.

Evidence: Completion evidence: the student defends a real specimen identification, explains a valid cross-specimen comparison, and states the limits of the evidence. The student must identify real grasshopper structures and state when variation or artifact limits the comparison.

Unit 4: Mollusk comparison and analogy limits [mollusk-comparison]

Inputs, synthetic data, selected-level tasks, and checked answers. Criteria: Science 1, Science 3, Science 4, Science 5.

Sources: OpenStax Biology 2e: Understanding Evolution; Understanding Evolution: Homologies.

materials: Use the supplied mollusk-mantle-records records, assigned source sections, calculator and an accessible graph or diagram. No physical apparatus is required.

record: Retain mollusk-comparison, the selected level, original inputs and first attempt, source/date, system and axes, units, assumptions, calculation/graph, uncertainty, correction and fresh transfer. Link only to the stated science criteria.

question: Which mollusk comparisons are supported by visible anatomy, and which require outside phylogenetic evidence?

prerequisites: Can identify mantle, gills or siphon/funnel, and body orientation in the selected mollusk route.

variables: Specimen model, structure, function, comparison category, and evidence limit.

controls: Compare the same structural level; do not compare an organ function to a tissue origin as if they were the same claim.

replication: Repeat the classification with one clam/squid structure and one outside vertebrate example.

analysis: Compute the proportion practice and write one homologous, one analogous, and one unresolved comparison.

Evidence: Completion evidence: the student defends a real specimen identification, explains a valid cross-specimen comparison, and states the limits of the evidence. The student must use homologous, analogous, and unresolved correctly in a mollusk comparison.

Unit 5: Perch vertebrate evidence without ancestor language [perch-vertebrate]

Inputs, synthetic data, selected-level tasks, and checked answers. Criteria: Science 1, Science 2, Science 3, Science 4, Science 5.

Sources: OpenStax Biology 2e: Organizing Life on Earth; OpenStax Biology 2e: Animal Form and Function.

materials: Use the supplied perch-circulation-records records, assigned source sections, calculator and an accessible graph or diagram. No physical apparatus is required.

record: Retain perch-vertebrate, the selected level, original inputs and first attempt, source/date, system and axes, units, assumptions, calculation/graph, uncertainty, correction and fresh transfer. Link only to the stated science criteria.

question: What vertebrate features can be identified directly on the perch, and what evolutionary claims require outside evidence?

prerequisites: Can orient a fish specimen and distinguish gill, fin, heart, and vertebral-column evidence.

variables: Structure, chamber count, body length, gill count, preservation note, and comparison category.

controls: Do not use living-species order as ancestry order; separate direct observation from reference evidence.

replication: Compare two model records and repeat the claim with a tree diagram supplied by the educator.

analysis: Compute the caudal-to-body proportion and write a direct-observation claim plus a phylogenetic-evidence claim.

Evidence: Completion evidence: the student defends a real specimen identification, explains a valid cross-specimen comparison, and states the limits of the evidence. The student must identify a real perch structure and state the evidence limit for fin-to-limb comparisons.

Unit 6: Frog systems and comparative physiology [frog-physiology]

Inputs, synthetic data, selected-level tasks, and checked answers. Criteria: Science 1, Science 2, Science 3, Science 4, Science 5.

Sources: OpenStax Biology 2e: Animal Form and Function; OpenStax Biology 2e: Organizing Life on Earth.

materials: Use the supplied frog-system-records records, assigned source sections, calculator and an accessible graph or diagram. No physical apparatus is required.

record: Retain frog-physiology, the selected level, original inputs and first attempt, source/date, system and axes, units, assumptions, calculation/graph, uncertainty, correction and fresh transfer. Link only to the stated science criteria.

question: How do frog organ systems support comparative physiology while preserving evidence limits?

prerequisites: Can identify major thoracic and abdominal structures and read a simple quantitative record.

variables: Structure, measurement, chamber count, lung condition, preservation note, and comparison organism.

controls: Use the same measurement landmarks and label artifact before comparing physiology.

replication: Repeat the comparison with a second image or model when a preserved organ is collapsed or displaced.

analysis: Compute the ratio and write the physiological explanation plus the artifact warning.

Evidence: Completion evidence: the student defends a real specimen identification, explains a valid cross-specimen comparison, and states the limits of the evidence. The student must defend a frog structure identification, a valid vertebrate comparison, and one preservation limit.

Unit 7: Fetal pig development and adult-body limits [fetal-pig-development]

Inputs, synthetic data, selected-level tasks, and checked answers. Criteria: Science 1, Science 2, Science 3, Science 4, Science 5.

Sources: OpenStax Biology 2e: Animal Form and Function; OpenStax Biology 2e: Organizing Life on Earth.

materials: Use the supplied fetal-pig-proportions records, assigned source sections, calculator and an accessible graph or diagram. No physical apparatus is required.

record: Retain fetal-pig-development, the selected level, original inputs and first attempt, source/date, system and axes, units, assumptions, calculation/graph, uncertainty, correction and fresh transfer. Link only to the stated science criteria.

question: How does developmental stage change the evidence a fetal pig can and cannot provide?

prerequisites: Can identify mammalian organ systems and knows that fetal and adult physiology differ.

variables: Crown-rump length, organ measurement, fetal structure, preservation note, and comparison claim.

controls: Label fetal structures and preservation before comparing to adult or human references.

replication: Check the claim against a second specimen image or model and a reference diagram.

analysis: Compute the proportional measurement and write a fetal-versus-adult evidence limit.

Evidence: Completion evidence: the student defends a real specimen identification, explains a valid cross-specimen comparison, and states the limits of the evidence. The student must defend fetal-pig identification with developmental context and state why the model is not a universal adult body.

Unit 8: Cross-specimen comparison defense [comparison-defense]

Inputs, synthetic data, selected-level tasks, and checked answers. Criteria: Science 1, Science 2, Science 3, Science 4, Science 5.

Sources: Understanding Evolution: Homologies; OpenStax Biology 2e: Understanding Evolution; OpenStax Biology 2e: Organizing Life on Earth.

materials: Use the supplied cross-specimen-evidence records, assigned source sections, calculator and an accessible graph or diagram. No physical apparatus is required.

record: Retain comparison-defense, the selected level, original inputs and first attempt, source/date, system and axes, units, assumptions, calculation/graph, uncertainty, correction and fresh transfer. Link only to the stated science criteria.

question: Which comparisons are homologous, analogous, or unresolved, and what evidence supports each category?

prerequisites: Can identify structures across at least two approved specimen routes and define homology and analogy.

variables: Specimens compared, visible evidence, outside evidence, classification, and limit.

controls: Compare the same structural level and keep specimen observation separate from phylogenetic reference evidence.

replication: Repeat the framework with a fresh comparison selected by the educator.

analysis: Tally the categories, then defend one unresolved case honestly.

Evidence: Completion evidence: the student defends a real specimen identification, explains a valid cross-specimen comparison, and states the limits of the evidence. The student must complete the dissection defense with a real identification, a valid comparison, and an evidence-limit statement.