A short test can add up correctly and still miss the learning you intended to check. A blueprint makes that mismatch visible before you write the final paper. Put the taught content down one side, the kind of thinking across the top, and trace every mark to a question. Then ask what evidence is missing, rather than simply adding more questions.
This worked example produces a six-item, 20-mark measurement check for a fictional primary class. All questions, marks and timings are original classroom choices, not KNEC or KICD allocations. Use the method with outcomes your learners have actually been taught; the example does not establish a current grade or term placement.
Start with a purpose small enough to serve
The fictional teacher wants to check whether learners can recall familiar measurement facts, use them in short calculations, and explain a capacity comparison. The result will help the teacher choose the next classroom practice. It is not intended to rank learners, certify a whole measurement strand, or decide progression.
Write the intended evidence before selecting attractive questions. In this class, the relevant teaching has covered:
- Length: recognise the centimetre symbol, recall 100 cm = 1 m, and add lengths after converting to centimetres.
- Mass: recognise the gram symbol, recall 1,000 g = 1 kg, and subtract masses expressed in compatible units.
- Capacity: convert litres to millilitres, combine stated liquid amounts, and explain whether a stated container holds enough for a proposed set of cups.
Practical handling of a ruler or measuring jug is outside this written check. A correct calculation cannot demonstrate that a learner aligns a ruler correctly or reads a physical scale. If that is an intended outcome, plan a separate observation or change the instrument; do not quietly claim the paper covers it.
Keep content, thinking demand and difficulty separate
Here, recall means retrieving a taught fact or symbol; use means carrying out a familiar measurement procedure; and explain means connecting supplied evidence to a conclusion. These are practical labels for this blueprint, not a complete taxonomy or an official cognitive split.
Demand describes what the task requires. Difficulty concerns how learners actually perform. An unfamiliar symbol may make a recall item difficult, while a well-rehearsed explanation may be answered successfully by most of a class. The verb “explain” alone does not prove that an item is demanding: inspect what the learner must do and how much of the reasoning the prompt supplies.
For this check, the teacher chooses 6 marks for length, 6 for mass and 8 for capacity. Capacity receives more because both calculation and evidence-based comparison matter to this particular purpose. Equal topic weighting is possible but not compulsory. Teaching time, importance and the strength of evidence needed all inform the decision; none supplies a universal formula.
The completed 20-mark blueprint
Numbers in the cells are marks, not counts of questions. Each of the six items is assigned once to the principal demand shown. Item 6 supplies the calculations so that its four marks genuinely assess explanation rather than hiding another conversion exercise in the explanation column.
| Content | Recall | Use | Explain | Total marks | Share of marks |
|---|---|---|---|---|---|
| Length | 2: item 1 | 4: item 2 | 0 | 6 | 30% |
| Mass | 2: item 3 | 4: item 4 | 0 | 6 | 30% |
| Capacity | 0 | 4: item 5 | 4: item 6 | 8 | 40% |
| Total | 4 | 12 | 4 | 20 | 100% |
| Share of all marks | 20% | 60% | 20% | 100% | 20 marks overall |
There are two numbered items for each topic. That does not mean each topic has one-third of the marks: two capacity items carry 8 marks, while the two length items carry 6. There are two recall items, three use items and one explanation item. Count numbered items, subparts and marks separately whenever they serve different planning purposes.
Six questions with checked answers
Suggested learner instructions: “Answer all six questions. For items 2, 4 and 5, show your conversion and calculation, then give an answer with its unit. For item 6, use the supplied information to explain your decisions.” This version is a written check without a calculator, assuming those calculations have been practised.
Item 1: length facts, 2 marks
Question: Complete “1 m = ___ cm”. Then write the standard symbol for centimetre.
Answer evidence: 100 earns 1 mark; cm earns 1 mark. This samples a conversion fact and a symbol, not a practical measurement skill. Provisional working allowance: 2 minutes.
Item 2: combine lengths, 4 marks
Question: Two strips are 1 m 35 cm and 85 cm long. What is their combined length in centimetres? Show your conversion and addition.
Answer evidence: 1 m 35 cm = 135 cm; 135 + 85 = 220; combined length = 220 cm. Allocate 1 mark each to the correct conversion, the addition model, the numerical total and the unit. The quantity is also 2 m 20 cm, but this prompt specifically requests centimetres. Provisional working allowance: 4 minutes.
Item 3: mass facts, 2 marks
Question: Complete “1 kg = ___ g”. Then write the standard symbol for gram.
Answer evidence: 1,000 earns 1 mark; g earns 1 mark. Provisional working allowance: 2 minutes.
Item 4: find a remaining mass, 4 marks
Question: A supply of modelling material has a mass of 2 kg 250 g. A group uses 750 g. What mass remains, in grams? Show your conversion and subtraction.
Answer evidence: 2 kg 250 g = 2,250 g; 2,250 − 750 = 1,500; remaining mass = 1,500 g. Allocate 1 mark each to conversion, the subtraction model, the numerical difference and the unit. Check: 1,500 + 750 = 2,250. Provisional working allowance: 4 minutes.
Item 5: combine liquid amounts, 4 marks
Question: A container has 3 L of water. Another 750 mL is added, with no spill. How much water is now in the container, in millilitres? Show your calculation. Assume the container is large enough.
Answer evidence: 3 L = 3,000 mL; 3,000 + 750 = 3,750; total = 3,750 mL. Allocate 1 mark each to conversion, the addition model, the numerical total and the unit. Provisional working allowance: 4 minutes.
Item 6: explain a capacity decision, 4 marks
Question: A jug contains exactly 2,000 mL of water. Each empty cup holds exactly 500 mL. Use these checked facts: four full cups need 2,000 mL; five full cups need 2,500 mL. There is no spill. Explain (a) why four cups can be filled exactly, and (b) why five cups cannot all be filled.
Answer evidence: (a) The four-cup requirement equals the available 2,000 mL, so filling four cups uses exactly all the water: 2 marks for the equality comparison and its consequence. (b) Five cups need more water than is available; the shortage is 500 mL, so at least one cup cannot be full: 2 marks for the insufficiency comparison and its consequence. “The fifth cup would have no water after filling four” is an equivalent explanation. No new arithmetic is required for full credit. Provisional working allowance: 4 minutes.
Worked repair: a correct total with an uncovered outcome
Suppose the first draft replaced item 6 with “Convert 4 L to millilitres; show the calculation”, still carrying 4 marks. Its answer, 4,000 mL, is correct. Its blueprint totals would nevertheless be recall 4, use 16, explain 0. The content totals would remain 6, 6 and 8, and the paper would still total 20.
The defect is not missing capacity marks. It is missing evidence that learners can justify a sufficiency decision. Replace that repetitive conversion item with the completed item 6 above. Move its 4 marks from capacity/use to capacity/explain. Nothing else needs extra marks: the repaired demand shares become 20%, 60% and 20%.
This repair also shows why a checklist of topic names is insufficient. The defective paper contains all three content headings. Only the second dimension reveals the uncovered outcome. Conversely, a zero in length/explain is acceptable here because explaining a length decision was not one of this small check’s selected outcomes.
Three teacher practice tasks
- Check a percentage claim. A colleague writes “capacity has two of six items, so its weighting is 33⅓%”. Is that the mark weighting? Solution: no. Item-count share is 2 ÷ 6 = one-third; mark share is 8 ÷ 20 = 40%. Both calculations are legitimate only when their denominators are named.
- Repair an arithmetic mismatch. A draft summary gives length 6, mass 7 and capacity 8, with a claimed total of 20. Solution: the rows add to 21. In this example, item 4 was accidentally entered as 5 rather than its intended 4 marks. Correct that entry, not an unrelated topic, then recalculate mass as 6 and the overall total as 20. If the extra mark were intentional, the questions and all weights would need redesign.
- Protect the outcome when reducing length. You need a 16-mark version that still samples every listed outcome. Which complete 4-mark item can you simply delete? Solution: none without losing a selected outcome: item 2 supplies length addition, item 4 mass subtraction, item 5 addition of liquid amounts and item 6 explanation. Shorten or redesign tasks and their evidence allocations, or explicitly narrow the purpose. A smaller total alone does not justify claiming unchanged coverage.
Check usability before using the paper
The working allowances add to 20 minutes. Add a provisional 2 minutes for instructions and 3 for checking, giving a 25-minute trial estimate. This is not a measured completion time or a mark-per-minute rule. A teacher must trial wording, writing load and pacing with comparable learners, then revise the allowance and any support arrangements.
Provide readable spacing and sufficient answer space. Clarifying an instruction must not reveal the conversion or comparison being assessed. Review the paper and its answer evidence together, and decide partial-credit rules before scoring. Keep this blueprint with the final question version so later edits do not silently change the intended balance.
Frequently asked questions
Must every cell contain a question?
No. Fill cells needed by the selected taught outcomes. A blank cell becomes a problem when relevant evidence is missing, not simply because the matrix contains a zero.
Should marks follow teaching time exactly?
Not necessarily. Time is one consideration alongside purpose and importance. Record why the chosen weight fits this check rather than treating hours taught as an automatic formula.
Can one item cover more than one demand?
Yes. If separate parts assess different demands, allocate their marks to separate cells and identify the parts. Never enter the full item total twice.
Does a 20-mark test need twenty questions?
No. This example has six numbered items with unequal mark values. State whether a total refers to items, response parts or marks.
Does the blueprint prove that the test is fair?
No. It helps inspect coverage. Wording, accessibility, scoring, teaching opportunities and classroom conditions still need human review and trial evidence.
Can I infer all measurement skills from a high score?
No. Interpret the score within the sampled written tasks. Practical measuring, unfamiliar applications and omitted outcomes need their own evidence.
Is this an official assessment specification?
No. It is an original low-stakes classroom illustration. Use the teacher’s current applicable curriculum design and school requirements when choosing actual outcomes and conditions.
Reference for the planning technique
The historical National Open University of Nigeria measurement and evaluation course, Module 3, Unit 4, discusses relating content and objectives in a test specification. It is a general teaching reference, not Kenyan assessment policy. The matrix, questions, weightings and trial timings here are original.
Add a provisional difficulty check to the blueprint
The six-item blueprint remains 20 marks with recall/use/explain totals 4/12/4. Add the following field beside it before use. “Likely straightforward” and “may require more checking” are teacher planning expectations for the imagined taught class, not measured item difficulty or official categories.
| Item | Expected challenge and basis | What a trial would need to record |
|---|---|---|
| 1 | Likely straightforward if 100 cm = 1 m and cm have been taught; symbol recall can still cause difficulty. | Correct conversion and correct symbol separately; omissions; wording/access issues. |
| 2 | May require more checking: convert mixed units before adding. | Count valid 135 + 85 setups separately from arithmetic and unit errors. |
| 3 | Likely straightforward after teaching, but do not infer that from its two marks. | Correct 1,000 and g separately. |
| 4 | May require more checking: 2,250 − 750 requires conversion and subtraction. | Locate conversion, subtraction-model, calculation and unit errors. |
| 5 | Provisional moderate challenge for this class: convert then add. This is a prediction, not a numerical statistic. | Record whether 3,000 + 750 is established before computing 3,750 mL. |
| 6 | Uncertain: calculations are supplied, but relating sufficiency to equal/greater quantities may require explanation support. | Count evidenced equality/consequence and insufficiency/consequence independently; retain actual wording. |
No trial has taken place for this draft. The observed-difficulty field for every item is therefore “not measured”. If comparable classroom use is later authorised, record the task version, taught group, conditions, number attempting, missing responses and how success was defined. A recall task can be difficult for that group; an explanation task can be familiar and successful. Revise wording or teaching support from response evidence rather than forcing items into a desired easy/hard split.
Teacher practice: In a wholly fictional trial, 6 of 8 assessed responses fully meet item 6, while 2 are partial. A colleague calls it “low cognitive demand because 75% succeeded”. Evaluate that claim.
Worked answer and review
6 ÷ 8 = 75% fully meeting the stated criterion in this fictional group. That is an observed success proportion, not the thinking-demand classification. Item 6 still asks for a supplied-data sufficiency explanation. Report the two partial responses and their missing evidence; do not treat this tiny invented example as a real trial of the test.
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