Lecture Plan: Neuronal Ultrastructure

What this document is

This page is a build plan for an instructor assembling a lecture on this unit. It gives the slide sequence, per-slide timing, the points at which figures belong, and the speaker notes that carry the argument. It is a design document, not a rendered deck: there are no slides on this page to project, and nothing here is written to be shown to learners as it stands.

A separately maintained Marp deck for this unit does exist, and it is linked at the foot of this page under Rendered deck artifacts. That deck was authored in its own right and does not follow this plan slide for slide, so treat this page as the teaching design and the Marp file as one existing implementation of it. The learner-facing material is the unit page linked under Connections.

Session profile

• Audience: annotators, proofreaders, and analysts needing ultrastructure fluency.
• Duration: 75 minutes lecture + 20 minutes image annotation drill.
• Output: labeled cue sheet with confidence scores and ambiguity notes.

Slide-by-slide lecture plan

1. Slide 1 (2 min): Title and practical stakes
2. Slide 2 (5 min): Ultrastructure as operational language
3. Slide 3 (6 min): Compartment refresher
   • Soma, dendrite, axon, boutons, spines.
4. Slide 4 (6 min): Synapse architecture essentials
   • Vesicles, active zone, PSD, cleft context.
5. Slide 5 (6 min): Organelle cues
   • Mitochondria, ER, microtubules in context.
6. Slide 6 (6 min): Multi-slice evidence protocol
7. Slide 7 (7 min): Worked example I
   • Easy compartment call with converging evidence.
8. Slide 8 (7 min): Worked example II
   • Ambiguous case and confidence annotation.
9. Slide 9 (6 min): Annotation disagreement analysis
10. Slide 10 (5 min): Frequent error modes
11. Slide 11 (5 min): QC metrics for ultrastructure calls
12. Slide 12 (5 min): Standardized decision log template
13. Slide 13 (7 min): Hands-on labeling prompt
14. Slide 14 (7 min): Debrief and bridge to process classification.

Sixty-minute tutorial: run-of-show

Pre-class (10–15 min, async)

• Read §1 and §2 of the unit page. Bring the organelle table.
• Open the unit page figure panel and preview at least three figures.
• Bring one cue you find ambiguous.

Materials

• Neuronal Ultrastructure lecture plan
• The figure panel above (RIV-ULTRA shortlist)

• A shared annotation sheet with columns: patch ID	compartment call	synapse call
  confidence tier	cue family 1	cue family 2	what would change my mind

The last column is the one that produces learning. Insist on it.

Minute by minute

Time	Activity	Instructor focus
00:00–05:00	Framing. Prompt: “What goes wrong if we force a label too early?”	Set the capability target; state that “uncertain” is a passing answer
05:00–12:00	Expert modeling. Work one patch aloud, following the §3 protocol	Think aloud about uncertainty, not just conclusions. Name each cue’s family explicitly
12:00–20:00	Guided practice 1. Two easy patches, in pairs	Circulate; ask “which family is that cue from?” rather than “is that right?”
20:00–30:00	Public debrief. Compare calls openly	Target the three misconceptions below
30:00–42:00	Guided practice 2. Two borderline patches, independently	Require two independent cues plus one uncertainty statement per patch
42:00–52:00	Consensus round. Groups reconcile using the tier definitions	Classify each disagreement: cue conflict / missing context / vocabulary mismatch
52:00–58:00	Competency check. One fully justified call each	Label + confidence + evidence chain + one alternative considered and rejected
58:00–60:00	Exit ticket. “One cue I trust more now; one I still mistrust”	Collect these — they are your calibration data for next session

The three misconceptions to target explicitly

1. “Small process = axon.” Size alone is unreliable; thin dendritic branches and spine necks are small too. Counter with a ribosome-bearing thin process.
2. “Dark contrast = synapse.” Counter with a tangentially sectioned membrane and with an adherens junction.
3. “Every patch must end in a hard label.” Counter by praising a well-justified “uncertain” in the public debrief. Learners calibrate to what gets rewarded, so reward it visibly, once, early.

Formative checkpoints

• At 20 min: ≥ 80% of pairs cite two cues from different families. If not, stop and re-teach §4 — proceeding without this makes the rest of the session unproductive.
• At 42 min: the disagreement log distinguishes cue conflict from missing context.
• At 58 min: each learner justifies one call with explicit uncertainty language.

Post-class (20–30 min)

Annotate three new patches; submit call, confidence, cue rationale by family, and one unresolved ambiguity with an escalation note.

Figure integration points

• Primary shortlist: course/units/figures/05-neuronal-ultrastructure-selected-v1.md.
• Use at least three cue-comparison panels and one ambiguity panel.

Speaker notes (expert-level)

• Require cue triangulation (morphology + organelle + context) before hard labels.
• Keep uncertain labels explicit; uncertainty is signal, not failure.

Assessment and artifacts

• Deliverable: cue-based annotation sheet with confidence tiers.
• Rubric dimensions: evidence quality, consistency, and uncertainty handling.

Connections

• Unit page: Neuronal Ultrastructure
• Journal club: Technical Track Journal Club
• Dictionary: Connectomics Dictionary
• Existing module overlap: module04, module09, module11

Rendered deck artifacts