Testing Until It Fails is a free printable Grade 3 to Grade 5 science worksheet on fair tests with variables controlled to find what to improve, aligned to Common Core standard 3-5-ETS1-3. It prints 8 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two pupils in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.
Set 1 of 25 · the same problems every time you open this link.
B.One run may reflect a build fault rather than the design
C.To use more water
2.A filter leaks at the seal every time. What is that?
A.Bad luck
B.A reason to abandon the design
C.A failure point, and the thing to redesign first
3.What should be recorded besides the result?
A.The weather
B.Who worked hardest
C.Every variable held constant, so somebody else can judge the test
4.Why is identifying a failure point more useful than a pass or fail?
A.It is quicker to write
B.It tells you exactly what to improve
C.It is not more useful
5.You change the filter material and the seal together. What is the problem?
A.It saves a lesson
B.You cannot attribute the change in performance to either
C.Nothing, it improved
6.After the seal is fixed, the frame collapses instead. What does that show?
A.The failure point moved, so the first fix worked
B.Nothing was learned
C.The design got worse
7.You test three filter designs. What must be identical?
A.Who pours
B.The water, the volume poured and how clarity is judged
C.The colour of the containers
8.A prototype passes every test easily. What should you do next?
A.Stop testing
B.Declare it finished
C.Test it harder until it fails, to find its limit
LessonPrint · 3-5-ETS1-3 · Set 1 · free to copy for classroom use
Answer key — Testing Until It Fails
Set 1. Prints on its own sheet.
1.One run may reflect a build fault rather than the design
2.A failure point, and the thing to redesign first
3.Every variable held constant, so somebody else can judge the test
4.It tells you exactly what to improve
5.You cannot attribute the change in performance to either
6.The failure point moved, so the first fix worked
7.The water, the volume poured and how clarity is judged
8.Test it harder until it fails, to find its limit
Questions about Testing Until It Fails
What does the Testing Until It Fails worksheet cover?
It practises fair tests with variables controlled to find what to improve — 8 questions for Grade 3 to Grade 5, all on Common Core 3-5-ETS1-3: Run fair tests, controlling the variables, to find what to improve. The instruction to pupils is “Circle the best answer”, and the answer key follows on the next sheet.
Which Common Core standard does Testing Until It Fails practise?
3-5-ETS1-3 — 3-5-ETS1-3, in the Engineering Design domain for Grade 3 to Grade 5. The published standard reads: “Plan and carry out fair tests in which variables are controlled and failure points are considered to identify aspects of a model or prototype that can be improved.” The worksheet assesses that standard rather than a paraphrase of it.
What age or grade is this worksheet for?
Testing Until It Fails is written for Grade 3 to Grade 5, typically ages 40-41. It is one of the sheets on 3-5-ETS1-3, so it suits any pupil working at that standard — including older pupils revisiting it and younger ones working ahead.
Does Testing Until It Fails come with an answer key?
Yes. All 8 answers are generated from the same problems as the questions, so the key cannot drift out of step with the sheet. It starts on a fresh sheet of paper, after the questions, so it is not handed out with the class by accident.
How many different versions of Testing Until It Fails can I print?
25 — one per pupil, and all 25 ask different questions. Set 1 downloads the whole class as a single PDF. Every version is fixed to its own address, so a sheet printed today holds the same problems when you reopen it next week.
Is Testing Until It Fails free to print and photocopy?
Yes. Testing Until It Fails, its answer key and its 25 versions are free to print and photocopy for your own class, with no account, no email capture and no subscription at the download step. Please do not resell them or republish them as your own.
Is there a lesson plan to teach 3-5-ETS1-3?
Yes — “Testing Until It Fails” is a 60-minute Grade 3 to Grade 5 plan for 3-5-ETS1-3, timed section by section, with the misconceptions to expect and an exit ticket. Testing Until It Fails is the practice that follows it.
More practice for 3-5-ETS1-3
Run fair tests, controlling the variables, to find what to improve.
Teaching this next? Testing Until It Fails is the 60-minute plan for it, with the misconceptions to expect.