New Delhi, Jul 25: Marks have changed after re-evaluation of answer sheets of Class 12 exam in over 4,000 cases which accounts for 0.075 per cent of total evaluated copies, the Central Board of Secondary Education (CBSE) said today.

The board, which is facing flak over evaluation errors, revealed the statistics and said action has also been initiated against over 200 teachers for "callous evaluation".

"Over 61 lakh copies were evaluated for Class 12 out of which there were 66,876 applications for the first stage verification process. Finally, there were changes in marks in only 4,632 cases which is just 0.075 per cent of the total copies evaluated," CBSE Secretary Anurag Tripathi said.

It was informed that changes in marks were made in 6.9 per cent of the 66,876 applications received. The secretary also pointed out that of the 4,632 cases, where there has been an increase in marks, 3,200 of them fall in the increase by 1-5 marks category, which otherwise is considered zero error.

"The board has already initiated suspension and strict action in case of 214 teachers for callous evaluation. To minimise human error, CBSE will further strengthen the system with the training of teachers and evaluators and technological intervention," he said.

Tripathi further explained, "Earlier the board's policy was to not affect any changes after re-evaluation if the changes ranged between 1-5 marks, as it is an accepted international norm that there will be 5-7 per cent differences in evaluation between one evaluator and other."

"However, in compliance of the 2017 order of Delhi High Court, the CBSE this year considered changes in marks even in the range of 1-5 which has led to an increase in the number of cases where changes have been recorded after re-evaluation," he added.