The organisation has threatened to shut down private schools. This is because private schools are excluded from the break that the President announced.
The four-week break will run from 27 July to 24 August for all grades except grades 7 and 12.
Learners in grade 12 will return on 3 August, while learners in grade 7 will return on 10 August.
COSAS has been vocal about wanting schools to close since Minister Motshekga first announced that they would be reopening.
It is now no surprise that the government's decision to let private schools continue with the school year has rubbed COSAS the wrong way.
Beauty Blennies of COSAS said:
"Yes, we understand that private schools are independent schools and the salaries of teachers and the salaries of the teachers come from the school fees of the learners, but when we talk about equal education, we need to speak from one voice and that means we need to speak from one point."
COSAS said it will take action because it feels that the decision to keep private schools open will create more inequality in the education system.
"We are going to try and gain access to schools and we are going to shut down private schools. We cannot allow segregation to be practiced during this pandemic” said Blennies.