Data analysis and limitations
Students will analyze their investigation data and write a CER that acknowledges experimental limitations.
Written CER with a dose-response claim, two specific data-point evidence entries, reasoning linking dose to worm response, and at least two limitations of the investigation.
- 1Do thisStudents will analyze their investigation data and write a CER that acknowledges experimental limitations.
- 2Use this resource
- 3Submit thisCER: Written CER with a dose-response claim, two specific data-point evidence entries, reasoning linking dose to worm response, and at least two limitations of the investigation.
- 4Submit it here
- 1CMSD website. Go to clevelandmetroschools.org and click the Clever button.
- 2Clever. Clever opens. Sign in if it asks.
- 3Microsoft (district) login. Use your district Microsoft account (the one for school).
- 4Schoology. Open Schoology, then your class, then Assignments, and find the file named below.
The file to submit is named: Human Anatomy & Physiology (Human Body Systems) › Unit 2.3 Challenge Accepted: Open-ended C. elegans/heavy metal investigation or validated simulation; data and conclusions. › CEROpen Schoology
- CER:
- Claim, Evidence, Reasoning — make a claim, back it with evidence, explain your reasoning.
- SOP:
- Standard Operating Procedure — the exact steps to follow (especially in a lab).
- Tracker:
- Your PLTW progress log where you record completed evidence.
- myPLTW:
- The PLTW course site where you do the online activities — you open it through Schoology.
Minute-by-minute · 80-minute block
💡 Big idea: Graphs make dose-response patterns visible; CER writing translates those patterns into scientific argument.
- 0-12Graph worm response vs. concentration; label axes, title, and units
- 12-28Identify the dose-response trend; decide on a specific claim
- 28-48Write full CER: claim, two specific data-point evidence entries, reasoning linking dose to response
- 48-60Add limitations section: at least two real limitations with brief explanation
- 60-72Peer review: partner checks claim specificity, evidence values, and limitations
- 72-80Revise and submit CER
- • Your data table is full; now you have to turn numbers into a scientific argument.
- • A graph makes the dose-response pattern visible so you can write a precise claim.
- • Every real scientific paper includes a limitations section, and so will your CER.
- • By the end of class you will have a complete, peer-reviewed CER ready to submit.
- 1Graph worm response across concentrations.
- 2Make a claim about the effect of the heavy metal.
- 3Cite two data points as evidence.
- 4Add reasoning linking dose to response.
- 5List two limitations of your investigation.
- • CER includes claim, evidence, and reasoning.
- • At least two real limitations are identified.
- • A dose-response graph shows the relationship between concentration and biological effect.
- • Scientific claims must be supported by specific data, not general impressions.
- • Acknowledging limitations demonstrates scientific honesty and is required for the Evaluate Body Systems WebXam domain.
Your PLTW work today
Unit 2.3 Challenge Accepted: Open-ended C. elegans/heavy metal investigation or validated simulation; data and conclusions. · Data analysis and limitations
Day 4 of this lesson. Open this exact section in myPLTW (reached through Schoology), then do the work below.
Do this: Complete the data-analysis or CER reflection prompt in Lesson 2.3 Challenge Accepted on myPLTW associated with today's dose-response graph and CER; finish it before peer review.
Mark the data-analysis task complete in myPLTW after submitting your CER with limitations.
Lab task is done; today the analysis task should show complete and your CER should be submitted.
Screenshot or note of completion status for your tracker.
All PLTW activities are completed inside the PLTW course environment — this page only gives direction. Submit producibles on Schoology.
Today's PLTW tracker
Check things off as you work, then submit. This tells Mr. Mendoza how you're doing so he can help the class. It does not replace turning in your producible on Schoology.
Use the code Mr. Mendoza gave you, not your name. Saved on this device.
Unit 2.3 Challenge Accepted: Open-ended C. elegans/heavy metal investigation or validated simulation; data and conclusions. · Data analysis and limitations
Complete the data-analysis or CER reflection prompt in Lesson 2.3 Challenge Accepted on myPLTW associated with today's dose-response graph and CER; finish it before peer review.
Lab task is done; today the analysis task should show complete and your CER should be submitted.
This is how Mr. Mendoza sees the class keeping pace with PLTW. Be honest, it only helps if it is accurate.
🎯 Students will analyze their investigation data and write a CER that acknowledges experimental limitations.
- Graph worm response across concentrations.
- Make a claim about the effect of the heavy metal.
- Cite two data points as evidence.
- Add reasoning linking dose to response.
- List two limitations of your investigation.
CER: Written CER with a dose-response claim, two specific data-point evidence entries, reasoning linking dose to worm response, and at least two limitations of the investigation.
Submit on SchoologyUpload by 11:29 PM for full credit.
| Task | Who |
|---|---|
| Graph worm response across concentrations. | _______ |
| Make a claim about the effect of the heavy metal. | _______ |
| Cite two data points as evidence. | _______ |
| Add reasoning linking dose to response. | _______ |
| List two limitations of your investigation. | _______ |
Working solo? Put your own name in "Who" for every row.
- CER includes claim, evidence, and reasoning.
- At least two real limitations are identified.
Resources & readings
Vetted readings and references for this unit. Use them to prepare, to catch up if you were absent, or to go deeper on today's target.
Lab & supplies
WebXam practice
Cumulative WebXam review
A quick mixed-review pulling questions from earlier units plus today, so the WebXam material stays fresh.
Where this leads — careers
What today's skills lead to. These are real health-science careers this course builds toward. Tap one to see, on the US Department of Labor's O*NET site, what the job actually involves, what it pays, and how fast it is growing.
What to do if you were absent
Today is individual PLTW work, so do exactly what we did in class, from home: complete the same PLTW target above, then submit your CER.
Open Schoology (CMSD) and keep goingHow to get there: open the CMSD website, click Clever, sign in with your Microsoft (district) account, then open Schoology from Clever.
Class still runs. Complete the online activity above (it's self-guided). Need the concept taught without a teacher? Use this authoritative explainer:
CDC: Lead poisoning preventionOptional extra credit (async)
You've passed Unit 2, so the optional extra-credit track is open. Complete reserved-unit work from home (virtual labs included) for extra credit, all submitted on Schoology.
Open the extra-credit track- CompleteEvery required part of the artifact is present, nothing left blank.
- AccurateThe science and the data are correct and match the evidence.
- Scientific reasoningYou explain your claim with evidence and reasoning (CER), not just an answer.
- Professional communicationClear, organized, labeled, and written the way a clinician or scientist would.
- SubmittedTurned in the right way (Schoology for routine work) and confirmed.
Drop your Thu, Nov 12, 2026 · Data analysis and limitations here. Use a clear file name (your initials + project). Routine work still goes to Schoology (via the CMSD portal).
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