Presidential spokesperson Bayo Onanuga said on Sunday the total of freed students was now 230.
Since the kidnapping, the exact number of people taken and how many have remained in captivity has been unclear.
It has not been formally made public how the government secured the latest release – or whether any ransom was paid.
The announcement by Onanuga, external included pictures of children smiling and waving. The students are expected to arrive in the Niger state capital, Minna, on Monday.
When the earlier release happened the governor of neighbouring Nasarawa state, Abdullahi Sule, told local media that the federal government had played a key role, adding that the behind-the-scenes efforts could not be disclosed for security reasons.
The Christian Association of Nigeria reported that 50 students managed to escape at the time of the kidnapping.