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 public practice answers (not assessment keys): Unit 08 learning pathway.
The student demonstrates the following:
Five science criteria plus separately reported integration (Page 3).
Observe a specimen; produce a labeled drawing at the scope.
The student defends the magnification and scale bar (Page 4).
Drawing, magnification, and scale bar kept distinct.
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 draw what they see and derive the magnification and scale bar. 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.
| Term | Accepted explanation | Distinction |
|---|---|---|
| Scale bar | Line representing a real specimen distance | After resizing, recalibrate pixel measurements; the label remains specimen distance if resizing is proportional. |
| Crop | Trimmed image field | Can remove context and must be disclosed. |
| Image integrity | Processing that preserves honest interpretation | Do not delete, clone or locally alter evidence without disclosure. |
| Artifact | Feature introduced by preparation or imaging | Do not draw it as a biological structure without evidence. |
| Criterion | Developing | Proficient | Mastery |
|---|---|---|---|
| Drawing conventions | Sketches loosely with a dull pencil, shading, and no title or labels. | Uses labels but shades the drawing, crosses leader lines, or leaves off the title. | Draws with a sharp pencil, clean unshaded outlines, ruled leader lines to each label, and a clear title. |
| Drawing what you see | Draws the textbook picture instead of the specimen in the eyepiece. | Draws from the scope but “corrects” it toward what was expected. | Draws or images the student's own field at the scope (observed), showing only visible evidence and separating observed structures from preparation or imaging artifacts. |
| Proportion & placement | Draws structures at wildly wrong relative sizes or positions. | Gets the overall shape but misjudges the size of one part against another. | Renders each structure in correct proportion and position relative to the others in the field. |
| Stating total magnification | Leaves off the magnification or guesses at it. | Records a magnification but from the wrong objective or without the eyepiece. | States the total magnification by multiplying the eyepiece and objective powers used for the drawing. |
| Adding a scale bar | Adds no scale bar, or draws one with no basis. | Draws a scale bar but cannot show how its length was derived. | Adds a calibrated, labeled scale bar with its calculation shown and documents resizing, cropping and image edits honestly enough for another person to repeat the estimate. |
| 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. |
The split between Proficient and Mastery is the field, not the book: a mastered drawing shows the actual specimen, including the unexpected. Ask “show me the fold you drew — is it really in the eyepiece?”
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 | Drawing conventions | Dev / Prof / Mast | |
| 2 | Drawing what you see | Dev / Prof / Mast | |
| 3 | Proportion & placement | Dev / Prof / Mast | |
| 4 | Stating total magnification | Dev / Prof / Mast | |
| 5 | Adding a scale bar | 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.