This packet is everything a parent or guide needs to assess Unit 07 at home — learning targets, the technique that counts as correct, the mastery rubric, calibration examples, and a clipboard score sheet. No multiple-choice test: the student shows mastery by opening a mammal in layers cleanly and locating and naming its external landmarks and internal organ systems on the specimen.
By the end of the Fetal Pig unit, a student should be able to:
Six criteria, each judged Not yet / Approaching / Mastered (Page 3).
Open the pig in layers; locate and name each structure on the specimen.
The student names each structure and its human analog on sight (Page 4).
Specimen, structures found, and a labeled sketch kept distinct.
You are making a decision, not adding up points. For each criterion, decide whether the work is Not yet, Approaching, or Mastered — the column language tells you which. A criterion counts as mastered only when the student can both perform the technique cleanly and name what they find without guessing. A student carries three tokens per term; one token buys a re-do of one criterion on another day, so a single bad afternoon never sinks the unit.
Accept any answer in the synonyms column — they are pre-approved as equivalent. The third column flags the confusions that look close but are not yet, so you can coach precisely.
| Canonical answer | Accepted synonyms | Common confusion / discriminator |
|---|---|---|
| External structures & orientation | ||
| Umbilical cord | navel cord | Connected the fetus to the placenta; carries the umbilical vessels |
| Mammary papillae | teats | Rows of nipples along the belly; present in both sexes |
| Anatomical planes | sagittal / frontal / transverse | Reference planes for describing where a structure sits |
| Directional terms | dorsal/ventral, anterior/posterior | Words for top/bottom and front/back on a four-legged body |
| Internal structures | ||
| Four-chambered heart | mammalian heart | Two atria and two ventricles — like ours |
| Diaphragm | muscular sheet | Divides the chest from the abdomen and drives breathing |
| Great vessels | aorta / venae cavae | Large vessels carrying blood to and from the heart |
| Reproductive organs | gonads | Testes or ovaries; identify the specimen's sex |
| Criterion | Not yet | Approaching | Mastered |
|---|---|---|---|
| Instrument handling & safe technique | Grips the scalpel, scissors, forceps, or probe awkwardly; cuts too hard or too deep into the large specimen; puts hands or specimen at risk. | Holds the instruments correctly with reminders and cuts more carefully, but still presses too hard or steadies the specimen poorly. | Holds each instrument the right way and makes shallow, controlled cuts on a large, multi-layer specimen, working safely for both the student and the specimen. |
| Careful, layered exposure & observation | Cuts straight through skin, muscle, and organs at once, destroying deeper structures. | Opens the layers in roughly the right order but rushes and disturbs structures before observing them. | Opens skin, then muscle, then the body cavity in sequence — exposing each layer cleanly without destroying what lies beneath, and observing before disturbing anything. |
| Locating & naming external structures & orientation | Cannot point to the umbilical cord or mammary papillae, or use directional terms. | Finds a few external landmarks with prompting but confuses the anatomical planes or directional terms. | Locates and names the umbilical cord, mammary papillae, and external anatomy, and uses anatomical planes and directional terms to describe where structures sit. |
| Locating & naming internal organ systems | Guesses at the organs or names the wrong ones once the cavity is open. | Finds the larger organs but cannot reliably trace the great vessels or distinguish the small from the large intestine. | Locates and names the heart and great vessels, lungs, diaphragm, liver, stomach, small and large intestine, kidneys, and reproductive organs on the specimen. |
| Explaining structure & function (and mammalian homology & specimen care) | Cannot say what a structure does, and lets the specimen dry out or handles it carelessly or disrespectfully. | Explains one or two structures' functions but not how the pig mirrors human anatomy, and keeps the specimen moist only when reminded. | Explains why key structures do their jobs — the four-chambered heart, the diaphragm dividing the cavity, the pig serving as an analog for human anatomy — while keeping the specimen moist, handling it respectfully, and cleaning up afterward. |
| Integration (cross-domain) | Treats the science as isolated facts; makes no cross-domain connection. | Names a link to history, reading, or writing but cannot defend why it matters. | Connects the unit to its anchor across History · Reading · Writing (plus chosen electives) and defends why the connection matters. |
The split between Approaching and Mastered is the structure on the specimen, not the guess: a mastered student traces the great vessels from the heart and names each organ. Ask “show me the diaphragm and tell me what it separates.”
Read these before you grade. They show what Mastered and Not yet actually sound like, plus the edge cases where you should coach rather than decide on the spot.
Student: ______________________________________ Date: _______________ Guide: _________________________
| # | Criterion | Decision | Notes |
|---|---|---|---|
| 1 | Instrument handling & safe technique | NY / Appr / Mast | |
| 2 | Careful, layered exposure & observation | NY / Appr / Mast | |
| 3 | Locating & naming external structures & orientation | NY / Appr / Mast | |
| 4 | Locating & naming internal organ systems | NY / Appr / Mast | |
| 5 | Explaining structure & function (and mammalian homology & specimen care) | NY / Appr / Mast | |
| 6 | Integration (cross-domain) | NY / Appr / Mast |
☐ No ☐ Yes — for criterion: __________ Tokens remaining: ☐ 3 ☐ 2 ☐ 1 ☐ 0
NY = Not yet · Appr = Approaching · Mast = Mastered · Unsure between two levels? Circle the lower one and note what a re-do would need.