5 Common OMR Filling Mistakes (and How Students Can Avoid Them)

OMR scoring is only as good as the marks on the page. A handful of avoidable mistakes cost students real marks every exam season. Share these tips before your next test.

1. Using the wrong pen

Always use a blue or black ball pen unless told otherwise, and darken the bubble completely. Faint or patchy marks may not be read.

2. Filling more than one bubble

Two marks for one question usually count as wrong. If you change your answer, do it cleanly and make sure only one bubble is dark.

3. Stray marks and folds

Doodles, smudges and folded corners can confuse a scanner. Keep the sheet flat and clean, especially the corner registration marks.

4. Misaligning the roll number

Write the roll number in the boxes and darken the matching bubbles below. A mismatch can attach a score to the wrong student.

5. Going out of order

Skipping a row and filling answers one line off is surprisingly common. Check the question number beside each row as you go.

For teachers

Print a short instructions line on every sheet — our generator adds one automatically — and do a 60-second demo before the exam. Cleaner sheets mean faster, more accurate grading when you scan them.