Single rubric covering all deliverables from Sections 1–7. Section 8 (ABS Trap) has a separate advanced rubric below. Total: 100 points (core) + 25 points (advanced).
Core Lesson — 100 Points
Section 1: Physics Foundations (15 pts)
| Criteria | Excellent (15) | Proficient (12) | Developing (8) | Incomplete (0–4) |
|---|
| Knowledge Check — 3 calculations |
All 3 correct with work shown and correct units |
2 of 3 correct, or all correct but missing units |
1 of 3 correct, or calculations attempted with significant errors |
Not attempted or no correct answers |
Section 2: FEA Workflow (10 pts)
| Criteria | Excellent (10) | Proficient (8) | Developing (5) | Incomplete (0–2) |
|---|
| Workflow labeling — 7 steps identified as human or computer |
All 7 correctly labeled, including "semi-automatic" for mesh |
5–6 correct, or all correct but mesh not noted as semi-automatic |
3–4 correct |
Not attempted or fewer than 3 correct |
Section 3: Simulation Setup (20 pts)
| Criteria | Excellent (5 ea.) | Proficient (4 ea.) | Developing (2 ea.) | Incomplete (0) |
|---|
| Material assignment screenshot |
Custom FDM PLA with all 5 properties correct and visible |
Custom material created but 1 property incorrect or unclear |
Used built-in material or multiple properties wrong |
Missing |
| Fixture placement screenshot |
Correctly placed on both support locations, arrows visible |
Correct locations but screenshot unclear |
Incorrect placement (wrong face, over-constrained) |
Missing |
| Load application screenshot |
Correct face, correct direction, correct magnitude, arrow visible |
Correct setup but magnitude or screenshot unclear |
Wrong face, wrong direction, or wrong magnitude |
Missing |
| Results summary |
Max stress, max displacement, min FoS all recorded with values in reasonable range |
All three recorded but one value seems off |
Missing one or more values |
Missing |
Section 4: Results Interpretation (10 pts)
| Criteria | Excellent (10) | Proficient (8) | Developing (5) | Incomplete (0–2) |
|---|
| Interpret provided results screenshot: identify max stress location, displacement, min FoS, and write 2-sentence summary |
All 4 elements correct. Summary demonstrates understanding of what FoS means practically. |
3 of 4 elements correct. Summary present but imprecise. |
1–2 elements correct. Summary vague or missing. |
Not attempted |
Section 5: Print Documentation (10 pts)
| Criteria | Excellent (10) | Proficient (8) | Developing (5) | Incomplete (0–2) |
|---|
| Bambu Studio settings screenshot + labeled specimen photos |
Screenshot shows all required settings (100% infill, 0.2mm, correct temps). 3+ labeled specimens with correct naming convention. |
Settings correct but screenshot missing one parameter. Or 3+ specimens but naming convention incomplete. |
Settings partially correct. Fewer than 3 specimens. Or no labeling. |
Missing documentation |
Section 6: Physical Testing (15 pts)
| Criteria | Excellent (5 ea.) | Proficient (4 ea.) | Developing (2 ea.) | Incomplete (0) |
|---|
| Data sheet completeness |
All load steps recorded with mass, force, deflection. Failure clearly noted. |
Most steps recorded, minor gaps |
Significant gaps or only failure recorded |
Missing |
| Calculations |
Flexural stress and modulus correctly calculated with work shown |
One calculation correct, one with minor error |
Formulas identified but significant math errors |
Missing |
| Specimen photo |
Clear photo showing failure location with label visible |
Photo present but failure location unclear |
Photo present but poor quality, can't see failure |
Missing |
Section 7: Comparison + Reflection (20 pts)
| Criteria | Excellent (10 ea.) | Proficient (8 ea.) | Developing (5 ea.) | Incomplete (0–2) |
|---|
| Comparison table |
All fields complete. Percent error correctly calculated. Failure location comparison includes Y/N match assessment. |
Table complete but percent error has minor calculation error |
Table partially complete or significant errors |
Missing |
| Written reflection (3–5 sentences) |
States percent error. Names 2+ specific, plausible error sources. Proposes specific improvements for closer match. |
States percent error. Names 1 error source. Proposes a general improvement. |
Vague reflection without specific analysis |
Missing or single sentence |
Section 8: The ABS Trap — Advanced (25 bonus pts)
| Criteria | Excellent (pts shown) | Proficient | Developing | Incomplete |
|---|
| Side-by-side comparison table (10 pts) |
All three columns complete (default ABS, corrected ABS, physical). Percent errors calculated for both. |
Table complete but one percent error incorrect (8) |
Table partially complete (5) |
Missing (0) |
| Written reflection (15 pts) |
Explains why default ABS produced larger error. Connects to injection-molded vs. FDM difference. Articulates the general principle about verifying simulation inputs. (15) |
Identifies the material mismatch but doesn't generalize the lesson (11) |
Vague explanation without connecting to material assumptions (7) |
Missing (0) |
Grade Scale
| Score | Grade | Description |
|---|
| 90–100 | A | Thorough understanding. Accurate calculations. Insightful reflection. |
| 80–89 | B | Solid understanding. Minor errors in calculations or reflection. |
| 70–79 | C | Basic understanding. Some gaps in documentation or analysis. |
| 60–69 | D | Partial completion. Significant gaps. |
| < 60 | F | Incomplete. Major sections missing. |
Advanced Credit
Section 8 points (up to 25) are added on top of the 100-point core. A student who earns 92/100 on the core + 22/25 on Section 8 = 114/100. Handle as extra credit per your grading policy.