This packet is everything a parent or guide needs to assess Unit 07 at home — learning targets, the answers that count as correct, the mastery rubric, calibration examples, and a clipboard score sheet. No multiple-choice test: the student shows mastery by examining mammal specimens and skeletal models and placing each animal in its group from what they observe.
By the end of the Mammals unit, a student should be able to:
Six criteria, each judged Not yet / Approaching / Mastered (Page 3).
Read teeth, skulls, and body plans; place mammals in their groups.
The student names a mammal's traits and its group (Page 4).
Observations, traits, and group placement 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 find the trait and justify the animal biology behind it. 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 |
|---|---|---|
| Mammal traits | ||
| Hair / fur | pelage | Unique to mammals; insulates the endothermic body |
| Mammary glands | milk glands | Nurse the young with milk — the trait that names the class |
| Endothermy | “warm-blooded” | Body heat from a high metabolism; costly but steady |
| Differentiated teeth | heterodont teeth | Incisors, canines, and grinding cheek teeth for different jobs |
| The three mammal groups | ||
| Monotremes | egg-laying mammals | Platypus and echidna; lay eggs yet nurse their young |
| Marsupials | pouched mammals | Kangaroo, opossum; young finish growing in a pouch |
| Placentals | placental mammals | Carry young to a later stage inside the body via a placenta |
| Four-chambered heart | double-loop heart | Keeps oxygen-rich and oxygen-poor blood apart |
| Criterion | Not yet | Approaching | Mastered |
|---|---|---|---|
| Defining mammal traits | Cannot say what separates a mammal from other vertebrates. | Names hair or milk but leaves out other defining traits. | Names the defining traits and uses them to test whether an animal is a mammal. |
| Teeth & diet | Cannot connect tooth shape to what an animal eats. | Notices teeth differ but cannot read a diet from them. | Reads differentiated teeth and infers an animal's diet from the pattern. |
| Endothermy & the mammalian body | Thinks warm-blooded is simply better. | Defines endothermy but treats it as a rank, not a trade-off. | Explains endothermy as a costly strategy that hair, a four-chambered heart, and a high metabolism support. |
| Monotremes, marsupials & placentals | Cannot tell the three mammal groups apart. | Names the groups but misplaces examples. | Sorts mammals into monotremes, marsupials, and placentals by how they reproduce. |
| Lab technique (specimen & skeletal study) | Skips the specimen or guesses without observing. | Examines a specimen but misreads teeth or ignores the key. | Examines mammal specimens and skeletal models with a hand lens, records observations, and reasons from teeth, skull, and limb structure. |
| 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 traits over habitat: the student goes by hair, milk, and teeth, not by where the animal lives. Ask “why is a bat a mammal and not a bird?”
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 | Defining mammal traits | NY / Appr / Mast | |
| 2 | Teeth & diet | NY / Appr / Mast | |
| 3 | Endothermy & the mammalian body | NY / Appr / Mast | |
| 4 | Monotremes, marsupials & placentals | NY / Appr / Mast | |
| 5 | Lab technique (specimen & skeletal study) | 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.