Did you know that giving a student zero for something the assignment never asked them to demonstrate can be as misleading as giving full marks for something nobody assessed? Imagine a class presenting its investigations through an approved narrated recording instead of a live talk. The teacher opens a rubric that includes ten points for live audience questions. There was no live question session. Is the score zero, ten, or something else?
“Not applicable” (N/A) means a criterion was not part of the agreed assessment opportunity and cannot meaningfully be judged from the permitted task. It is different from zero, which records performance against an applicable criterion that a student did not meet. If a teacher has explicitly approved removing an inapplicable criterion and proportionally rescaling the remaining points, the calculation is awarded applicable points ÷ available applicable points × 100%. Do not change an official examination or school rubric on your own; any alteration must follow the authorised assessment policy.
The rubric, students, points and presentation formats in this article are invented examples for learning how to reason fairly. They are not MOE or SEAB scoring instructions, descriptions of real pupils, approved access arrangements for a particular learner or promises of grades. The educational question is how to separate missing evidence from a genuinely inapplicable requirement.
Start with the diagnostic: which sentence describes the situation?
Give a learner these three miniature cases. Case A: the assigned task requires a conclusion but the student submits no conclusion. Case B: the teacher approves a purely written alternative to a live presentation, so the approved task has no question-and-answer segment. Case C: the task requires a live Q&A; the student is present but refuses to answer, and no approved alternative arrangement exists.
Ask the learner to label each case “not demonstrated,” “not applicable,” or “needs an authorised decision.” A reasonable starting diagnosis is: A is an applicable requirement with missing work; B may be N/A if the authorised alternative assessment truly excludes that skill or uses an approved substitute criterion; C is not automatically N/A and must be judged under the published task and any applicable school procedures. The learner should explain why the same blank cell cannot be interpreted identically in all three cases.
If a learner answers ‘every blank criterion is zero’, they may be confusing the absence of an assessment opportunity with insufficient performance. If they answer ‘every missing section is N/A’, they may be erasing standards whenever work is incomplete. Both errors can distort the meaning of a score.
What a rubric is for—and what it cannot decide alone
A rubric is a scoring guide that sets out an assignment’s important criteria and describes levels of performance. Cornell University’s Center for Teaching Innovation explains that rubrics clarify expectations, help instructors assess work consistently and make feedback more useful. A good rubric should make the performance to be demonstrated recognisable, not simply attach points to vague impressions.
A rubric is not, however, a universal authorisation to delete any category that is inconvenient. The course’s essential learning outcomes, original instructions, documented alternatives, school rules and approved accommodations determine what remains required. When the live audience interaction is an essential learning outcome, it may need another valid assessment method rather than removal. An individual teacher should follow the appropriate institutional process before altering a criterion.
For readers exploring accessibility, Stanford University’s Office of Accessible Education describes alternative assessment approaches and emphasises the essential learning objectives. Its university-specific procedures do not govern Singapore schools; the general lesson is to distinguish the skill being assessed from the means of demonstrating it, and to make authorised alternatives clear in advance.
Hand-checked worked example: 72 points out of 90 applicable
Suppose a fictional school club awards up to 100 rubric points for a research presentation. All students in one approved presentation format will be assessed in the following way. The original rubric lists evidence (40 points), reasoning (30), teamwork (20) and live audience questions (10). The approved format is a prerecorded group presentation with no live Q&A, and the teacher has explicitly authorised the final criterion to be excluded and the other categories to be rescaled. These assumptions are essential to the calculation.
Fictional criterion Maximum Earned Applicable?
Research evidence 40 32 Yes
Reasoning and conclusion 30 24 Yes
Team contribution 20 16 Yes
Live audience Q&A 10 N/A No, by prior approval
Original maximum 100
Applicable maximum 90
Applicable earned 72Step one: add the earned applicable points: 32 + 24 + 16 = 72. The N/A category does not contribute earned or available points. It is not a secretly awarded ten, and it is not a zero.
Step two: add the available applicable points: 40 + 30 + 20 = 90. This is the denominator, because the teacher’s fictional approved method assesses only these three criteria.
Step three: calculate the adjusted percentage: 72 ÷ 90 × 100 = 80%. An independent check is that each applicable category earned four-fifths of its maximum: 32/40, 24/30 and 16/20 all equal 80%. Therefore the combined score is also 80%.
Step four: communicate the condition: write “72/90 applicable points = 80%; live Q&A marked N/A under approved task design.” The note is part of the result, because 80% without context can be mistaken for 80/100 on the original four-category assessment.
The numerical result describes performance on the remaining criteria. It does not demonstrate that the learner has mastered live audience questions, and it does not certify equivalence with a course that genuinely tested all four skills.
Compare the three decisions without confusing them
- Applicable and completed: Score the demonstrated work against the criterion and its published descriptors.
- Applicable but not demonstrated: Follow the actual rubric or authorised missing-work policy; a zero or another specified treatment may apply, but do not quietly relabel it N/A.
- Not part of the approved task: Record N/A and use the approved alternative calculation or replacement criterion, not an invented after-the-fact adjustment.
- Unclear whether applicable: Pause and seek an authorised decision before finalising a grade. Retain the evidence and original rubric.
- Approved accommodation: Assess essential learning objectives through the authorised method and protect confidentiality; do not publicise another student’s private access arrangements.
The key question comes before the arithmetic: What was the student actually given a fair, authorised chance to demonstrate? Only after that answer is clear can the scoring denominator be chosen.
Second example: why an omitted requirement is not N/A
Return to the same fictional 100-point rubric, but this time imagine a live presentation in which the Q&A was a required part of the task. The group earned 32 evidence points, 24 reasoning points and 16 teamwork points, but did not answer the live questions. If the official applicable marking rules award zero for that missing demonstration, the total is 72 + 0 = 72 out of 100 = 72%.
Notice what changed: not the first three scores, but the assessment design. The original result of 80% and this result of 72% answer different questions under different approved conditions. Simply selecting the more favourable denominator after seeing the work would be unfair.
Likewise, if a teacher had already agreed on a substitute for the ten points—perhaps a recorded response to pre-specified follow-up questions—the fourth criterion should be assessed as that approved substitute requires. It would not be legitimate to both award substitute points and remove the same ten points from the denominator.
A third example: N/A does not always mean ‘drop the whole category’
Imagine a fictional rubric in which ‘Audience Response’ has two parts: identifying audience questions (five points) and evaluating one’s response afterwards (five points). If the task includes a written reflection that assesses the second part, the second five points may remain relevant even when no live questions occurred. The teacher must examine each descriptor, rather than crossing out all ten points because the heading says ‘audience’.
The correct response might be to keep the reflection requirement, substitute a different task, or amend the rubric prospectively. We cannot decide that from a heading alone. This is why the exact skill, task instructions and approved procedure matter more than convenience.
An audit trail that a parent, learner or colleague can understand
A transparent scoring record should show the criterion, maximum points, observed performance, earned points, any N/A status and the written reason for that status. The reason can be brief but specific: “No live audience segment in approved recorded format; Q&A criterion excluded under revised rubric dated [date].” Do not include confidential health or disability explanations in a public mark sheet.
Keep the originally communicated rubric and the approved replacement or revision. If changes occur after students have begun working, record who authorised them, when students were informed, and how consistency is maintained. This is useful not because every classroom needs elaborate bureaucracy, but because a score should be reproducible from the evidence and the rules.
Where a teacher is not authorised to adjust the marking scheme, the safest immediate action is to identify the ambiguity, preserve the submitted work and refer the decision to the responsible academic lead. A spreadsheet that automatically divides by 90 cannot supply the required permission.
Guided-to-independent practice
Guided exercise. A fictional creative project uses three applicable categories worth 20, 30 and 50 points. A fourth category is not part of this task and has already been excluded by the published rubric. The learner earns 16, 21 and 45. Calculate 16 + 21 + 45 = 82 out of 20 + 30 + 50 = 100, or 82%. The unchanged total is a deliberate reminder that not every N/A label implies a new denominator.
Intermediate exercise. A four-category rubric originally offers 25, 25, 25 and 25 points. One 25-point category is legitimately N/A under a previously approved design. The remaining scores are 20, 15 and 25. The applicable score is 60/75 = 80%. Ask the learner to explain why 60/100 = 60% would answer a different question under this approved case.
Independent exercise. A learner receives scores of 14/20, 30/40 and 22/30; a further 10-point live-performance criterion has no evidence. Before calculating, the learner must write the missing fact: was the last criterion excluded by an authorised alternative or required but not demonstrated? If authorised N/A, (14 + 30 + 22)/90 = 66/90 ≈ 73.3%. If required and scored zero under the governing rule, 66/100 = 66%. Both calculations are correct under their different assumptions. Choosing between them requires the actual policy.
Transfer challenge. A science poster rubric includes safety equipment use, but the authorised task is an analysis of publicly available data without any practical experiment. Identify the reason a physical equipment criterion might be N/A, suggest a suitable replacement if safety reasoning itself is a learning outcome, and explain why students should learn the final rules before submission.
A reproducible spreadsheet calculation
In a teacher-approved spreadsheet, one approach is to enter earned points only for applicable items and sum their corresponding available maxima. The formula is 100 * SUM(earned_applicable_points) / SUM(maximum_applicable_points) when the denominator is positive. The ranges must contain only those criteria authorised as applicable to the assessment. If the denominator is zero, the calculation is undefined; report “no applicable criteria” and request a valid assessment plan rather than dividing by zero.
Do not leave ambiguous blanks in the mark sheet. A blank can mean unmarked, missing evidence, no result yet or not applicable. Use explicit status labels and separate the reasons from the numeric marks. This matters especially when a report is exported, copied to a different spreadsheet or read months later.
What learners, parents and teachers can observe
A learner has made meaningful progress when they can distinguish the assessment’s scope from its score, identify the authorised denominator, check a calculation independently and say what remains unassessed. An easy exit ticket is to give two identical numerical records but different task instructions, then ask the learner why their percentages differ.
A parent should ask, “Which skill was assessed, and what feedback would help next?” rather than relying on a percentage alone. If a criterion is N/A, that does not mean the student is weak at that skill; it simply means the particular result offers no evidence either way. If the skill matters for future learning, a separate low-stakes opportunity to practise it may be valuable.
Teachers can test whether their revised rubric is understandable by asking another colleague to calculate the same example independently. If two competent assessors produce different denominators, clarify the rule before applying it across a class. Keep comparisons between approved assessment formats appropriately qualified.
Thoughtful frequently asked questions
Is not applicable the same as a zero mark?
No. Zero is a score against an applicable, assessable criterion; N/A means the criterion was not part of the authorised assessment opportunity. The school’s rules—not the learner’s preference—determine that distinction.
Can a student decide to mark a difficult criterion N/A?
No. A student cannot unilaterally remove an assignment requirement. They can ask for clarification or an appropriate authorised alternative through the school’s processes.
Must every N/A criterion be excluded and the remaining marks rescaled?
No. The governing rubric may specify a substitute task, a replacement weighting, a common alternative rubric or no adjustment at all. The 72/90 calculation is one explicitly assumed approved method, not a universal grading rule.
Is 80% on an adjusted 90-point rubric identical to 80% on a 100-point live rubric?
The percentages are numerically equal, but the evidence is not necessarily equivalent if different skills were assessed. A fair comparison requires alignment of essential outcomes and an authorised framework, not matching arithmetic alone.
What if an assessment criterion was announced only after submission?
The learner should seek clarification and an authorised, documented resolution. Applying a surprise requirement without a reasonable opportunity to demonstrate it is a separate fairness issue from simple arithmetic.
Can students use this article to challenge an official exam grade?
No automatic grading entitlement follows from this instructional illustration. Official assessment marking, access arrangements, reviews and appeals are governed by the responsible institution and current procedures.
Further learning and the core aim
Continue with the previously published Core Aim guide on reading a blank exit ticket without misdiagnosing learning, and the guide to checking that a spreadsheet returns the correct student’s assessment record. For related skills, eduKateSG’s classroom oral-presentation and fair-feedback reference and Education Hub offer wider context.
The immutable Secondary 1 Mathematics tutorial reference provides our educational baseline: diagnose first, explain clearly, practise step by step and check that students can transfer the idea on their own. For rubrics, the core aim is not to make every percentage larger. It is to make every published assessment result interpretable, accurate, appropriately authorised and genuinely helpful for the learner’s next step.