Conducting and Evaluating Fair Scientific Tests in Grade 6 Science

Prepared By: DepEd Club Team - DEPEDCLUB.COM
Fair Tests:
Conducting, Replicating, and
Evaluating Scientific
Investigations
Science 6 | Term 1 Week 8
Good science changes one factor,
measures one outcome, repeats, and
records honestly.
Learner-facing complete discussion deck
Grade 6 | Science | Term 1 Week 8 | V12.5 1

Overview
BOW-Strict Week 8 Coverage
Continuation of Fair Test from Weeks 7–8
Content Standard: Scientific investigations need fair tests and
accurate, reliable measurements.
Performance Standard: Learners recognize and apply the
features of a fair test.
Learning Competency 8: Change one factor, measure one
factor, and keep other factors the same.
Learning Competency 9: Use at least three trials or
replication, observe carefully, measure accurately, and record
properly.
Week 8 Focus: Conduct, replicate, analyze, improve, and
communicate a safe investigation.

Overview
Week 8 Learning Journey
From approved plan to evidence-based conclusion
Session 1: Audit and improve the Week 7 plan until it is fair, safe, and repeatable.
Session 2: Conduct a teacher-approved investigation using at least three trials and complete records.
Session 3: Analyze data for precision, reliability, possible errors, and claim-evidence-reasoning.
Session 4: Present the investigation, respond to questions, and apply fair-test thinking to an
environmental model.
Throughline: A result becomes stronger when it is repeated, measured, and explained with evidence.

Overview
Essential Question and Success Criteria
What makes investigation evidence trustworthy?
Essential Question: How can we make a scientific investigation fair, repeatable, and reliable?
I can plan: identify independent, dependent, and control variables.
I can conduct: follow the same safe procedure in at least three trials.
I can analyze: tell what repeated data show and what they cannot prove.
I can communicate: make a claim supported by measurements, observations, and reasoning.

Overview
FAIR-R Reminder
Use this through all four sessions
F — Focus: change only one factor on purpose.
A — Accurately measure: measure one outcome using a
correct tool and unit.
I — Identically control: keep other important conditions the
same.
R — Repeat: do at least three trials or use clearly labeled
replication/sample data.
R — Record and reason: record honestly and explain what
the evidence supports.

Overview
Core Vocabulary
Use these words in every scientific explanation
Independent variable: the factor changed on purpose.
Dependent variable: the result measured or observed.
Control variables: conditions kept the same to make the test fair.
Replication: repeating the same investigation under the same conditions.
Reliability: confidence that results are consistent and not just due to chance or error.

SESSION
1 Audit and Improve the Fair-Test Plan
Focus Question: Can another group repeat the investigation safely and fairly?

Session 1
Retrieve the Week 7 Plan
Start from what groups already planned
Group statement: “We change ___, measure ___, and keep
___ the same.”
Confidence mark: Circle one part of the plan that is clear.
Revision mark: Star one part that needs more detail or
safety checking.
Goal: Make the plan specific enough that another group
could follow it without guessing.

Session 1
Variable Check: I Change, I Measure, I Keep
Every fair test must name these clearly
Independent Variable
The one factor changed on purpose.
Example: water temperature.
Dependent Variable
The outcome measured or observed.
Example: dissolving time in seconds.
Control Variables
Everything important kept the same. Example: cup,
water amount, sugar amount, spoon, stirring.
Sentence frame: I change ___ to see what happens to ___ while keeping ___ the same.
Practice: identify variables for plant height, paper towel absorption, sugar dissolving, and model-
pollutant tests.

Session 1
Model a Flawed Test
Why changing many things is not fair
Flawed version: Water temperature, sugar amount, cup size, and stirring method all change.
Problem: If one cup dissolves faster, we cannot tell which change caused it.
Revision: Change only water temperature; keep all other materials and steps the same.
Science habit: When many factors change, the evidence becomes unclear.

Session 1
BOW Performance Task: Sugar Dissolving Fair Test
A safe physical-change investigation
Part Room-Temperature Water Teacher-Prepared Lukewarm Water Keep the Same
Changed factor Room-temperature Lukewarm Only temperature changes
Measured outcome Time to dissolve Time to dissolve Same timer and start/stop rule
Materials Identical cup Identical cup
Same water amount, sugar type/amount,
spoon
Procedure Same stirring pattern Same stirring pattern Same duration rule and reset condition
Safety: no boiling water; the teacher handles warmer water.

Session 1
Write a Testable Question and Hypothesis
A hypothesis can be supported or not supported by evidence
Testable question: Does water temperature affect how fast equal amounts of sugar dissolve?
Hypothesis: If sugar is placed in lukewarm water, then it may dissolve faster because warmer water may help
particles move more quickly.
Not testable: “Warm water is better.”
Better: “Which condition changes the dissolving time?”

Session 1
Plan Audit: Five Approval Questions
Peer review before materials are released
1
Only one factor changed?
2
One measurable outcome?
3
Important controls listed?
4
Procedure safe?
5
Repeatable by another
group?
Teacher Approval Conference
Groups revise any unsafe, unclear, or unfair step. Materials are released only after the plan passes the audit.
Exit Ticket: Our test is fair because we change ___, measure ___, keep ___ the same, and repeat ___
times.

Session 1
Quick Check: Planning a Fair Test
Choose the best answer. Explain one item using evidence.
1. Which plan is a fair test? A. Change water temperature and sugar amount B. Change water temperature only and keep all other
conditions the same C. Use different cups and water amounts D. Change procedure every trial
2. In a dissolving test, the factor intentionally changed is the: A. independent variable B. dependent variable C. conclusion D. control
group
3. The time for sugar to dissolve is the: A. control variable B. independent variable C. dependent variable D. hypothesis
4. Which should be controlled? A. final conclusion B. opinion C. amount/type of sugar, water amount, cup, and stirring method D. the
result
5. Which is a testable hypothesis? A. Sugar is useful B. Warm water is nice C. Equal sugar may dissolve faster in lukewarm water than
room-temperature water D. Science is interesting
Answer Key: 1-B, 2-A, 3-C, 4-C, 5-C

SESSION
2 Conduct the Investigation
Focus Question: How do repeated trials and careful records make evidence
stronger?

Session 2
Safety and Group Roles
Safe science starts before testing
Roles: materials manager, procedure reader, timer/measurer,
recorder, and fairness checker.
Safety rules: use only teacher-approved materials, avoid
tasting, avoid unknown chemicals, and clean spills
immediately.
Tool check: confirm units, zero/start point, timer rule, and
labels before beginning.
Warm water rule: teacher handles lukewarm water and
confirms it is safe.

Session 2
Numbered Procedure: Make the Test Repeatable
A clear procedure allows replication
1
Label cups A and B
2
Measure equal
water
3
Add equal sugar
4
Stir same pattern
5
Time until
dissolved
6
Record value and
unit
7
Reset and repeat
Important: Start the timer at the same moment every trial and stop using the same rule.
Reset: Use fresh equal quantities when needed so one trial does not affect the next.
Fairness checker: watches whether controls remain identical across trials.
Never change the procedure just to get the expected result.

Session 2
Three-Trial Data Table
If there is no table, the record becomes unclear
Trial Changed Factor Measured Outcome Unit
Observations / Unexpected
Events
1 Room temp / lukewarm ____ seconds ____
Good record
Trial 1: 42 s; Trial 2: 41 s; Trial 3: 42 s. Notes: sugar stuck briefly to spoon in
Trial 2.
Weak record
“It was fast.” The value, unit, trial label, and observation are missing.

Session 2
Record Honestly and Immediately
All data matter, including unexpected results
Write now: Record values and observations as soon as each
trial ends.
Do not hide: Unusual values must not be erased just because
they are surprising.
Mark for analysis: Write a note such as “delayed timing,”
“sugar clumped,” or “spill occurred.”
Scientific honesty: Clear records help future learners
improve the method.

Session 2
When Time or Materials Are Limited
Use sample data truthfully
Best option: Conduct at least three authentic trials when time and materials allow.
Acceptable support: Conduct one pilot trial and use clearly labeled teacher-provided sample data for
the remaining trials.
Never acceptable: Copying sample data as if your group measured it.
Transparency: The report must state which data were group-measured and which were sample data.

Session 2
Quick Check: Conducting and Recording
1. The minimum number of trials emphasized in the lesson is: A. one B. two C. three D. ten
2. Which is the best record? A. “It was fast” B. “Trial 1: 42 s; Trial 2: 41 s; Trial 3: 42 s” C. “The result was good” D. “About one minute”
3. Why reset the set-up before the next trial? A. To change more factors B. To keep one trial from affecting the next C. To make the
result expected D. To avoid recording data
4. Before measuring, a learner should: A. guess B. check the zero or starting point and correct unit C. change the tool each trial D.
round every value
5. If teacher-provided data are used, they should be: A. hidden B. copied as personally measured C. clearly labeled as sample data D.
changed to match the hypothesis
Answer Key: 1-C, 2-B, 3-B, 4-B, 5-C

SESSION
3 Analyze the Evidence
Focus Question: What can repeated data show, and what are its limits?

Session 3
Reliability and Replicability
One result may happen by chance or error
Replicability: The investigation can be repeated under the
same conditions and produce similar results.
Reliability: The results are consistent enough to be trusted
more than a single measurement.
Why repeat? Repeated trials reduce the effect of one
mistake, delay, or unusual event.
Caution: Similar results are stronger evidence, but they do
not prove every future case.

Session 3
Precision and Accuracy
They are related, but not the same
Precision
Repeated measurements are close to one another.
Example: 25.0 cm, 25.1 cm, and 25.0 cm.
Accuracy
A measurement is close to the accepted or true value. It
needs a trusted reference or calibrated tool.
Precise but not necessarily accurate
Three dissolving times can be close together, but we may not
know a single “true” dissolving time.
Accurate reference needed
Accuracy is easier to judge for length or mass when a known
standard or correctly calibrated tool is available.
Precision can be judged from repeated results; accuracy needs a trustworthy comparison.

Session 3
Data Audit Checklist
Trustworthy records are clear, complete, and honest
Check headings: question, trial labels, changed factor,
measured outcome, units, and observations.
Check units: seconds, minutes, grams, milliliters, centimeters,
or other correct units.
Check consistency: same decimal places when possible and
same start/stop rule.
Check completeness: no missing trials, hidden values, or
unexplained changes.
Check honesty: unusual results are noted, not deleted.

Session 3
Simple Range and Average
Use basic mathematics to compare repeated results
Condition Trial 1 Trial 2 Trial 3 Range Simple Average
Room temp 76 s 80 s 78 s 4 s 78 s
Lukewarm 42 s 41 s 42 s 1 s ≈42 s
Range: highest value minus lowest value. A smaller range may suggest more precise results.
Average: add all values and divide by the number of trials. Use teacher guidance if needed.
Interpret: In this sample, lukewarm water has shorter and more consistent dissolving times.

Session 3
Graph and Claim-Evidence-Reasoning
A conclusion needs more than “my hypothesis was correct”
Claim: State whether the evidence supports or does not
support the hypothesis.
Evidence: Cite at least two measurements, trends, or repeated-
trial patterns.
Reasoning: Explain how the changed factor may have affected
the measured outcome.
Limitation: Name one possible error or condition that limits
the conclusion.

Session 3
What To Do With an Unusual Value
Do not delete it just because it is different
First: Keep the original value visible in the data table.
Second: Check the tool, unit, start/stop timing, and procedure.
Third: Write a possible source of error if one is found.
Fourth: Repeat the trial when appropriate and clearly label any repeated trial.
Never: Invent a replacement or change the value to support the hypothesis.

Session 3
Quick Check: Reliability, Precision, and Accuracy
1. Precision means repeated measurements are: A. close to one another B. always equal to zero C. written without units D. close to an
opinion
2. Accuracy means a measurement is: A. repeated three times B. close to an accepted or true value C. close only to the other readings D.
always a whole number
3. When no trustworthy reference value is available, which can be judged most directly from repeated results? A. accuracy only B.
precision or consistency C. opinion D. proof
4. If three results differ greatly, the best action is to: A. erase the unusual value B. choose the favorite result C. inspect the procedure
and tool, explain the difference, and repeat when appropriate D. invent a replacement
5. A scientific conclusion should say that evidence: A. proves every hypothesis forever B. supports or does not support the hypothesis C.
must match the expected result D. is unnecessary when a graph is present
Answer Key: 1-A, 2-B, 3-B, 4-C, 5-B

SESSION
4 Communicate and Apply
Focus Question: How do scientists share evidence and use fair-test thinking
responsibly?

Session 4
Three-Minute Investigation Report
Communicate the complete scientific story
Include: question, hypothesis, variables, control and
experimental set-ups.
Method: safe materials, numbered procedure, and three-trial
data.
Evidence: table or graph, observations, and any unexpected
events.
Conclusion: claim, evidence, reasoning, limitations, and one
improvement.
Audience: another group should understand what happened
without guessing.

Session 4
Fair Test Gallery Walk
Peer review makes the investigation stronger
1
Identify changed factor
2
Identify measured factor
3
Find controls
4
Check three trials
5
Ask one scientific question
Two Evidence Stars
Name two strengths based on the data or procedure, not on
friendship or popularity.
One Scientific Question
Ask one question that would help the group improve fairness,
safety, precision, or reasoning.
Feedback sentence: “The evidence is stronger if…”

Session 4
Environmental Model: Pollutants as Changed Factor
Apply fair-test thinking to a safe model, not real polluted water
Independent variable: amount of clean model pollutant added,
such as measured paper pieces.
Dependent variable: water clarity or visible particles after a
fixed observation time.
Control variables: same container, same water amount, same
lighting, same observation time, same stirring.
Safety: use only clean classroom materials; never touch, smell,
or test unknown polluted water.
Connection: Fair tests help people think more carefully about
environmental protection.

Session 4
Scientific Responsibility
Good science protects people, materials, and the environment
Safety: Use safe methods and follow teacher instructions.
Honesty: Report all results, including surprising or imperfect data.
Evidence: Distinguish observation, measurement, inference, and opinion.
Humility: Avoid claims that go beyond the data.
Care: Clean the area and dispose of materials properly.

Session 4
Final Performance Task Evidence
What the group submits or presents
Evidence What it must show
Fair-test plan question, hypothesis, variables, controls, safe materials, repeatable steps
Three-trial record trial labels, values, units, observations, and unexpected events
Data display table, bar graph, line plot, or organized visual summary
CER conclusion claim, two evidence points, reasoning, limitation, improvement
Peer response answers to questions using actual evidence

Session 4
Final Quick Check: Fair Test Communication
1. A strong conclusion includes: A. claim only B. evidence only C. claim, evidence, and reasoning D. personal preference only
2. In a safe model test of pollutant amount and water clarity, the independent variable is: A. amount of model pollutant B. water clarity
C. container label D. data table
3. In the same test, the dependent variable is: A. water amount B. container size C. observed or measured water clarity D. observation
time
4. Scientific honesty requires learners to: A. hide results that differ B. keep and explain all recorded results C. change data to support
the hypothesis D. report only the fastest trial
5. Which sequence best describes a reliable fair test? A. Change many factors and do one trial B. Change one factor, measure one factor,
control the others, repeat, record, and reason from evidence C. Use no measurements D. Change procedure after every trial
Answer Key: 1-C, 2-A, 3-C, 4-B, 5-B

Closure
Whole-Lesson Synthesis
Good science is careful because decisions should be based on fair and reliable evidence
Fair design: change one factor, measure one outcome, and
control important conditions.
Reliable procedure: repeat the same test at least three times
or use clear replication.
Accurate records: use correct tools, units, headings, trial
labels, and honest observations.
Evidence-based conclusion: use claim, evidence, and
reasoning, not “proven forever.”
Next learning: These investigation habits will support future
Science topics, including the circulatory system.

Closure
Ways Forward and Differentiation
Use learner evidence to plan the next support
Reteach: variable identification using “I change ___ and measure ___.”
Support: provide color-coded cards, guided data tables, oral reporting, and teacher-guided trials.
Practice: scale reading, timing, units, resetting trials, and keeping controls identical.
Enrich: graph class data, calculate mean/range, compare two methods, or improve another fair-test
plan.
Reflect: What made your data trustworthy? What should you improve next time?

Closure
Extended Learning Opportunities
Practice fair-test thinking safely outside class
Home plan review: Draw control and experimental set-ups and explain changed, measured, and
controlled factors to a family member.
Safe measurement: Measure the same household object three times and record units.
Simulator option: Use a teacher-approved fair-test simulator or printed scenario.
Environmental guide: Prepare a one-page Fair Test Guide with FAIR-R and one honest-data reminder.
Safety: Do not conduct unsafe experiments at home.

Closure
Pabaong Kaisipan
Fair tests help us ask better questions and make better decisions.
A reliable scientific investigation is not only about
getting an answer. It is about making the process
fair, repeating carefully, measuring clearly,
recording honestly, and explaining what the
evidence really supports.
Change one factor. Measure one
outcome. Keep the rest the same.
Repeat. Record. Reason from evidence.

Conducting and Evaluating Fair Scientific Tests in Grade 6 Science

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