WebXam pretest and goal setting
Wed, Sep 2, 2026 · Week 2 · Principles of Biomedical Technology (Principles of Biomedical Science)
Today's goal: Take an ungraded baseline WebXam pretest for 072110 Principles and Practice of Biomedical Technology to see where you start, then set a mastery goal and reflect on week 1.
This is a model of the work you should turn in today. Use it to check your own: match the structure and the level of detail, do not copy it. Your data and wording should be your own.
SCAFFOLD FOR YOUR MICROSCOPE CER
1. Claim: The most supported conclusion is ____ because the evidence most consistently points to ____.
2. Evidence 1: E__ shows ____. This matters because ____.
3. Evidence 2: E__ shows ____. This matters because ____.
4. Evidence 3: E__ shows ____. This matters because ____.
5. Reasoning: Taken together, E__, E__, and E__ support the claim because ____.
6. Limitation or conflict: However, E__ is limited or conflicts with E__ because ____. Therefore, the evidence cannot prove ____.
7. Final check: I used at least three exact evidence IDs, explained how they work together, named one limitation, and wrote most supported instead of proved guilty.
WORKED PARALLEL CASE: THE MISSING PH METER
Reference record: A pH meter was found missing after lab cleanup. Person B signed it out at 2:10 PM (E1), a hallway camera showed someone in Person B's distinctive lab jacket carrying a long instrument case at 2:18 PM (E2), and Person B's badge opened the storage-room exit at 2:16 PM (E5). A mixed touch-DNA sample from the case handle included Person B (E3), but Person B had used the meter during class, so that result could come from routine contact.
Claim: Person B is the most supported person connected to the pH meter's removal, but the record does not prove that Person B took it improperly.
Evidence and reasoning: E1 places the meter in Person B's documented possession shortly before it went missing. E5 independently places Person B's badge at the storage-room exit six minutes later. E2 adds a time-matched observation of a person wearing Person B's distinctive jacket and carrying a case shaped like the meter case. Taken together, E1, E5, and E2 form a consistent sequence from possession to exit, so they support Person B more strongly than any one record alone.
Limitation: E2 does not show the person's face, and a badge or jacket could have been used by someone else. E3 is also weak for timing because routine class use could explain the touch DNA. Therefore, the evidence supports a lead for follow-up, not a finding of guilt.
This model shows the level of evidence and organization needed to complete: John Hay original evidence-reasoning practice for PBS Unit 1. It prepares students for bounded CER writing but does not replace a myPLTW activity.
- Write one defensible claim.
- Choose specific evidence that supports the claim.
- Explain the scientific rule that connects the evidence to the claim.
Keep the structure. Replace the question, facts, measurements, and evidence. Then recheck units, vocabulary, and whether the conclusion goes beyond the evidence.
Also due today: Complete the actual microscope CER and submit it in Schoology under the exact title The Missing Microscope: Crime Scene CER Scenario.
Turn in: The Missing Microscope: Crime Scene CER Scenario, scaffold and parallel exemplar
Go to Schoology to turn this in.
Submit one PDF. Put your first and last name in the document header. Name the file: FirstName LastName - Assignment Title - YYYY-MM-DD.pdf.
Open Schoology PDF upload helpIf you cannot get in, see Mr. Mendoza. Do not skip the work.
Claim ceiling: Today's evidence supports a classroom claim about today's lesson. It cannot prove causation, diagnose a real patient, or justify action outside this room.
One exam-style question that uses exactly what you practiced today. Try it before you reveal the answer, then read why each choice is right or wrong.
Tap an answer to see the full explanation. Nothing is recorded or graded.
It builds this reusable test skill: selecting a bounded claim supported by multiple evidence records.
- Name the concept or data pattern being tested.
- Cross out choices that violate that rule or the evidence.
- Justify the best remaining choice before checking the answer.