When two grammar answers are both defensible: half marks, key revision, or re-test
Your Class 10 grammar worksheet is out of 20: five items on sandhi and samasa, five on vibhakti, five on verb forms, five on transformation (active to passive, direct to indirect). Thirty pupils wrote it. Item 3 gives a compound and asks whether it is tatpurusha or dvandva; in the sentence supplied, the compound can be read as 'X of Y' or as 'X and Y', and seven pupils chose the reading your key does not carry. Item 7 asks pupils to join 'ಸೂರ್ಯ' + 'ಉದಯ'; four wrote ಸೂರ್ಯೋದಯ and three wrote ಸೂರ್ಯದಯ. Item 12 asks for a passive transformation; one pupil produced a passive of the right shape but shifted the tense from present to past, and you marked it wrong. The subject coordinator says grammar keys must be 'single-answer' and that no item may carry two correct answers in the board's format.
1. Item 3 has two defensible readings and seven pupils chose the one your key lacks. What do you do - award, cancel, or keep the key? Give the decision rule you will apply to all future samasa items.
Read the worked answer
Decision: award full marks to both readings, and add a note rather than cancelling the item. Cancelling punishes the 23 pupils who read the context correctly; keeping a single key punishes seven who read it plausibly.
But the award must be conditional on the pupil's justification, since the compound alone is ambiguous and the sentence disambiguates it: accept the reading that the pupil's own reason supports. Pupils who wrote a label with no reason keep whatever the context supports.
Decision rule for all samasa items (put it in the key):
- If the members can be joined by 'and' (আনಿ) without nonsense → dvandva.
- If one member is the head and the other a modifier in a case relation ('of', 'for', 'by') → tatpurusha, and name the case.
- If meaning depends on the sentence, the item must be printed with the sentence, or it is not a fair single-answer item.
For the coordinator, phrase it as item design, not leniency: 'the ambiguity was in the stem; the key now carries the disambiguating context.' That keeps the single-answer format honest instead of pretending ambiguity does not exist.
2. Item 7: four pupils wrote ಸೂರ್ಯೋದಯ and three wrote ಸೂರ್ಯದಯ. Which is correct for 'ಸೂರ್ಯ + ಉದಯ', and how do you explain the rule so the three do not repeat the error?
Read the worked answer
ಸೂರ್ಯೋದಯ is correct. At the junction, the final -ಅ of ಸೂರ್ಯ and the initial ಉ- of ಉದಯ are both vowels; the combination is resolved by the vowel-strengthening (ಗುಣ) sandhi, giving -ಓ-, written ೋ. The other three pupils applied a deletion rule instead of the strengthening rule - they dropped one vowel rather than merging the two into a single strengthened one. That is a rule substitution, not carelessness.
Board explanation in three lines:
- Check the last sound of the first word and the first sound of the second: both vowels?
- If a + u, the result is a single long -o- sound (ಗುಣ), not a deletion.
- Compare with a second pair in the same lesson (ದೇವ + ಆಲಯ → ದೇವಾಲಯ) so the class sees that different vowel pairs give different results.
Marking: 0 for ಸೂರ್ಯದಯ, but write 'ಗುಣ ಸಂಧಿ' beside it, not a cross alone. The error must be named so the pupil can retrieve the rule; an unnamed cross teaches nothing and the same three pupils will fail the board item.
3. Item 12: the pupil's passive is correctly formed but the tense shifted from present to past. You marked it wrong and the pupil says 'but it is passive'. Decide, and state how many marks the item carries and why.
Read the worked answer
Uphold the zero, but on the stated criterion, not on 'wrong'. If the item is out of 1, the mark is for a passive transformation of the given sentence in the given tense; the pupil changed the meaning, so the transformation is not complete. Had the item been out of 2 (form 1, meaning/tense preserved 1), the pupil would score 1.
Script comment, in Konkani: 'ರೂಪ್ ಬರೆಂ, ಪುಣ್ ಕಾಳ್ ಬದಲಾಯ್ಲೊ - ಅರ್ಥ್ ಬದಲಾಯ್ಲೊ.' (Form correct, but tense changed - meaning changed.) This is what makes the mark teachable rather than arbitrary.
Class note to prevent recurrence: transformation items always carry two things to preserve - voice/type and tense/person/negation. Teach pupils to underline the tense of the source sentence before rewriting, then check it after. Apply the same two-part split to the direct-to-indirect items so the rubric is consistent.
Reasoning: the coordinator's 'single answer' instruction is about keys, not about collapsing a two-property task into one; naming the properties keeps the single key while allowing part marks when the item's mark value permits.