Most weak exams are weak before the first question is written: they sample whatever topics came easiest to set, in whatever mix of difficulty emerged by accident. A CBC exam is an instrument for measuring strands, and instruments are designed. The design tool is a blueprint table, and it takes twenty minutes that repay themselves at marking time.
This guide walks through the method in the order a teacher would use it: decide the sampling, set the demand levels, write the scheme first, then write and check the questions. It works for an end-of-term test, a mock or a short topic quiz, at any grade.
The blueprint: decide the sampling before writing
| Strand (weight in term's work) | Recall items | Understanding items | Application items | Marks |
|---|---|---|---|---|
| Strand A (30%) | 2 | 2 | 1 | 15 |
| Strand B (30%) | 2 | 1 | 2 | 15 |
| Strand C (25%) | 1 | 2 | 1 | 12 |
| Strand D (15%) | 1 | 1 | 1 | 8 |
The rules the table enforces: every strand taught appears in roughly the proportion it was taught; no strand is examined only at recall level; and application items, where the learner uses the strand on an unfamiliar case, carry real marks. An exam of thirty recall questions measures memory, whatever the paper's title says.
How to fill in the weights
Open the scheme of work for the term and count lessons per strand. If Strand A took nine of thirty lessons, it carries about 30% of the marks. This is a judgement, not a formula: a strand with heavy practical work may deserve a little more written weight if its skills can be tested on paper. What matters is that the decision is made deliberately, before any question exists.
The three demand levels in practice
Teachers often agree with the idea of mixed demand but find it hard to tell the levels apart when writing. A simple test is to ask what the learner has to do with the content.
| Level | What the learner does | Typical command words | Practice example (Integrated Science) |
|---|---|---|---|
| Recall | Reproduces a fact, name or definition | State, name, list, identify | Name the method used to separate sand from water. |
| Understanding | Explains or compares in their own words | Explain, describe, compare, give a reason | Explain why filtration works for sand and water but not for salt and water. |
| Application | Uses the idea on a case they have not met | Suggest, predict, calculate, how would you | A trader's maize is mixed with small stones. Suggest how to separate them and give a reason. |
The examples above are practice items written for this guide, not official KNEC items. Notice that the application question uses a household setting the learner may not have seen in class. That unfamiliarity is the point: it tests whether the strand has been understood or only memorised.
Write the marking scheme first
Writing the scheme before polishing the question exposes bad questions instantly: if you cannot write the acceptable answers and their mark splits, the learners cannot divine them either. A good scheme states the points that earn each mark, the acceptable alternatives, and what earns nothing, which is exactly the discipline our rubrics guide applies to performance tasks. Report language for the results belongs in the BE, AE, ME, EE guide, and lesson-level alignment in the lesson plan guide.
For the application item above, a scheme entry might read: method named (sieving or winnowing, either accepted) 1 mark; reason linked to the size or weight difference between stones and grain 1 mark; "pick them out" alone earns the method mark only if it is described as a sensible process. Writing that line forces the setter to decide in advance what counts.
A checklist before the paper goes to print
- Does every item map to one cell of the blueprint? Items that fit nowhere are usually off-strand.
- Is each question answerable from the wording alone? Ask a colleague to read it cold.
- Do the marks match the effort? A two-step explanation should not be worth one mark.
- Are the command words consistent? "Explain" should always mean a reason is required.
- Is the reading load fair? Long stems in Mathematics or Science can test English instead of the strand.
- Does the paper end with time to spare? Sit it yourself and allow learners roughly double your time.
After marking: use the blueprint again
The blueprint earns its keep a second time once the scripts are marked. Total the class's marks by row and by column. A strand where the class did well on recall but poorly on application tells you exactly what to reteach, and that is far more useful than a single class average. The same analysis gives each learner specific feedback for their report, in the BE, AE, ME, EE language parents will see.
If you are running Grade 9 mocks this term, our teacher's guide to running KJSEA mock exams in Term 3 covers timing, invigilation and feedback, and the blueprint above slots straight into it.
Borrow a working model
The fastest way to calibrate is to mark against a professionally built pair. The Grade 9 Integrated Science Term 2 exam with its matching marking scheme shows the blueprint method executed end to end: strand sampling, mixed demand levels, and a scheme that teaches while it marks. Set your own paper beside it once, and the twenty-minute blueprint becomes a habit your learners feel in fairer marks.
Frequently asked questions
How long should building a blueprint take?
About twenty minutes once the scheme of work is open in front of you. It saves far more time later, because the questions write faster and the marking is clearer.
Should every strand be tested at all three levels?
Not always, but no strand should be tested at recall alone. A small strand might carry one recall and one application item and still be measured fairly.
Can I use the same blueprint every term?
Use the same layout, but redo the weights each term from the lessons actually taught. The point is that the paper reflects the teaching that happened.
Where do I find ready-made papers to compare against?
For Grade 9, the KJSEA Integrated Science predictive papers and the other subject sets in the shop come with marking guides you can study alongside your own.
To see the full method in one worked example, start with the Grade 9 Integrated Science Term 2 exam and its marking scheme.
KJSEA and KPSEA: 13 days to the first paper
The Grade 9 KJSEA course covers all 9 learning areas for KSH 400. The Grade 6 KPSEA course covers all 5 subjects for KSH 300. Notes, worked examples, topical questions and full marking schemes in both.
⏳ Only 13 days to the national assessments on 26 October. Start now.
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