Use these targets, vocabulary, rubrics, examples, and score sheet with the instructor's approved lesson and procedure. This is an assessment companion, not a complete lesson or safety authorization.
Student lessons, data, and worked answers: Unit 01 learning pathway.
The student demonstrates the following:
Five science criteria plus separately reported integration (Page 3).
Epidermal peels and prepared cross-sections — read live under the scope.
The student reasons from what they see under the scope aloud (Page 4 anchors).
Contemporaneous record of slides, sketches, and structures identified.
You are making a decision, not adding up points. For each criterion, decide whether the work is Developing, Proficient, or Mastery — the column language tells you which. A criterion counts as mastered only when the student can both run the technique and justify the plant biology behind it. Each student has three tokens per term; each token retries one rubric criterion. Approved accommodations, equipment failures, and approved absences are handled separately and do not consume these tokens.
Accept listed synonyms; use the distinction column to resolve near-matches.
| Canonical answer | Accepted synonyms | Common confusion / discriminator |
|---|---|---|
| The plant cell | ||
| Cell wall | cellulose wall | Rigid layer outside the membrane; gives shape — not the membrane |
| Central vacuole | large vacuole | Fills with water to create turgor; shrinks when the plant wilts |
| Cell membrane | plasma membrane | Inside the wall; controls what enters and leaves the cell |
| Turgor pressure | turgidity | Water-filled vacuole pressing on the wall; lost water = wilting |
| Plastids | ||
| Chloroplast | green plastid | Site of photosynthesis; not in every plant cell |
| Chromoplast | pigment plastid | Reds and oranges in fruit and flowers; no photosynthesis |
| Amyloplast | starch plastid | Stores starch in roots and tubers; colorless |
| Tissue systems | ||
| Dermal tissue | epidermis | Outer covering; bears the stomata and guard cells |
| Ground tissue | parenchyma / collenchyma | Fills the body — storage, support, photosynthesis |
| Vascular tissue | xylem & phloem | Transport tissue; not the same as ground tissue |
| Meristem | growth tissue | Dividing cells that generate all the other tissues |
Ask what the preparation actually resolves and how the visible structures support a function. Use a labeled reference for unseen organelles. Plastid distribution depends on tissue and conditions; do not treat a root-cell example as a rule without exceptions.
| Criterion | Developing | Proficient | Mastery |
|---|---|---|---|
| Plant cell structure & organelles | Confuses structures or claims details the image cannot resolve. | Names structures but blurs observations and diagram labels. | Explains plant-cell structures and functions, identifying only what the preparation resolves and using labeled references for other organelles. |
| Cell wall & central vacuole | Thinks the cell wall and cell membrane are the same thing. | Defines the cell wall but cannot explain turgor or the vacuole's role. | Explains how the cellulose wall and a turgid central vacuole give a plant cell its shape and support, and predicts what happens when the cell loses water. |
| Plastids & chloroplasts | Thinks every plant cell is green and full of chloroplasts. | Names plastids but treats their distribution as universal. | Distinguishes chloroplasts, chromoplasts, and amyloplasts and relates their distribution to tissue, development, and exceptions. |
| Tissue systems & meristems | Cannot name the plant tissue systems. | Lists dermal, ground, and vascular tissue but cannot place them in a real section. | Locates dermal, ground, and vascular tissue in a stem or leaf section and explains how meristems generate each. |
| Lab technique (microscopy of plant tissue) | Cannot prepare or focus the approved sample. | Observes features but misidentifies tissue or sampling area. | Uses approved peels or sections, identifies appropriate visible tissues, and calculates field density without treating fields as independent plants. |
| Integration (cross-domain) | Makes no supported connection between the source and the science. | Uses the source but needs help connecting evidence, writing, or limitations to the science. | Independently connects History, Reading, and Writing using a cited source, appropriate evidence, a limitation, and a scientific explanation. |
Read these before you grade. They show what Mastery and Developing actually sound like, plus the edge cases where you should coach rather than decide on the spot.
Student: ______________________________________ Date: _______________ Guide: _________________________
| # | Criterion | Decision | Notes |
|---|---|---|---|
| 1 | Plant cell structure & organelles | Dev / Prof / Mast | |
| 2 | Cell wall & central vacuole | Dev / Prof / Mast | |
| 3 | Plastids & chloroplasts | Dev / Prof / Mast | |
| 4 | Tissue systems & meristems | Dev / Prof / Mast | |
| 5 | Lab technique (microscopy of plant tissue) | Dev / Prof / Mast | |
| 6 | Integration (cross-domain) | Dev / Prof / Mast |
☐ No ☐ Yes — for criterion: __________
Tokens left this term after this session (choose one): ☐ 3 ☐ 2 ☐ 1 ☐ None left
Dev = Developing · Prof = Proficient · Mast = Mastery · Unsure between two levels? Circle the lower one and note what a re-do would need.