CBSE Class 12 OSM Row Explained: What Went Wrong, What Students Can Do Now, and Why the Nation Is Watching
Something quietly important happened to over 4 lakh students in India this month. Their Class 12 board exam answer sheets, evaluated through a brand-new digital system, came back with results that raised serious questions. Some students saw marks that did not match what they had written. One student reportedly watched their Physics percentage jump from 84 to 91 after re-evaluation. Another found correct Chemistry answers marked wrong. A PIL was filed in the Allahabad High Court. And the Union Education Minister stepped before the cameras to take personal responsibility.
This is not a small administrative glitch. This is the CBSE On-Screen Marking (OSM) controversy, and it deserves to be understood fully by every student, parent, and educator connected to Indian school education.
Why the CBSE OSM Controversy Matters to Every Class 12 Student
The CBSE Class 12 results 2026 affect admissions to colleges and universities across the country. When marks are incorrect, even by a few points, the consequences are not abstract. A student can miss a cutoff for their preferred college. A year of effort can get misrepresented by a number on a screen.
Over 11 lakh answer scripts were evaluated through OSM this year. The scale means even a small percentage of errors translates into thousands of affected students.
What Is On-Screen Marking and How Did CBSE Introduce It
On-Screen Marking (OSM) is a digital evaluation system where scanned images of student answer sheets are uploaded to a platform, and examiners mark them on a computer screen rather than reviewing physical papers. The idea is reasonable on paper: reduce handling errors, improve consistency, allow remote evaluation.
CBSE rolled this out for Class 12 this year through a Hyderabad-based company. Investigators later pointed out that the same company had reportedly been linked to an exam row in Telangana back in 2019. Whether or not those concerns were raised before the contract was awarded remains unclear.
Significantly, multiple reports suggest CBSE ignored calls for a regional pilot test before the full rollout. No large-scale trial. No gradual phase-in. The system went live for millions of scripts.
What the Discrepancies Actually Look Like
The problems reported are varied and unsettling.
Students found their answers evaluated incorrectly. One student's re-evaluated Chemistry paper showed correct answers previously marked as wrong. Another saw a significant jump in marks after requesting re-evaluation, raising the question of how reliable the original evaluation was.
A former student claimed the CBSE website itself had security vulnerabilities, saying they had flagged these to the government previously with no response. An ethical hacker came forward with similar observations.
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CBSE officials, meanwhile, instructed school principals to defend the OSM system publicly, and one viral report indicated schools received guidance to "make reels" and "back OSM" rather than allow panic to spread. That approach did not go over well with students or educators who were genuinely affected.
How the Government Has Responded
Education Minister Dharmendra Pradhan took an unusually direct step. He publicly accepted responsibility for the discrepancies, called them unacceptable, and promised action against those responsible. He also chaired a high-level review meeting at CBSE headquarters and separately held discussions with senior officials of four public sector banks to overhaul the CBSE payment gateway system.
IIT experts have been roped in to review the OSM process. The re-evaluation portal opened on May 29, 2026, covering over 4 lakh students and 11 lakh answer scripts.
What Students and Parents Should Do Right Now
The re-evaluation process is now open. Students who believe their marks are incorrect should apply for answer sheet verification or full re-evaluation through the CBSE official portal before the deadline closes. Deadlines in these processes tend to be strict.
Do not wait to see if things "sort themselves out." If your marks seem off, file formally. Keep records of everything.
Closing Thoughts
The OSM controversy is one of those situations where the technology was not the real problem. The failure was in rushing implementation, skipping pilots, and not having robust safeguards before millions of student futures were fed into a new system. Students who worked for a year deserved better testing of the tools used to judge them.
The re-evaluation window is open. Use it if you need to.
Disclaimer: This article is based on information available across the web. Parchar Manch does not take responsibility for its complete accuracy, as the content could not be fully verified.
FAQs
What is CBSE OSM and why is it controversial?
OSM stands for On-Screen Marking, a digital evaluation system introduced for CBSE Class 12 this year. It is controversial because widespread discrepancies were reported in student marks, with some getting significantly different scores on re-evaluation.
How can affected students apply for CBSE Class 12 re-evaluation?
Students should visit the official CBSE website and apply through the answer sheet verification or re-evaluation portal. The window opened on May 29, 2026, and covers over 4 lakh students. Apply before the deadline.
Has the government taken action over the CBSE OSM row?
Yes. Education Minister Dharmendra Pradhan personally accepted responsibility, chaired a review meeting at CBSE headquarters, and has promised action against officials responsible for the discrepancies. IIT experts have also been brought in to assess the system.
Is there legal action being taken?
A PIL was filed in the Allahabad High Court alleging that OSM caused large-scale evaluation errors in CBSE Class 12 results.
Which company handled the CBSE OSM system?
A Hyderabad-based company managed the platform. Reports have linked the same company to a separate exam controversy in Telangana in 2019, raising concerns about the due diligence followed before awarding the contract.
Will CBSE continue using OSM in future years?
The process is under review. IIT experts have been engaged to evaluate the system, and CBSE has acknowledged that changes are needed before any future rollout.