KIndly guide, RTI can be filled against a private school in Delhi

I am interested in knowing the procedure to file RTI against a private school in Delhi. Recently they are collecting the higher tuition fee i.e Rs. 8413. According to the school authority, they had filed a request against the provision of section 17 (3, 18(5), 24(1)of the DSEA 1973 read with the rules 172, 173, 175 & 177 of the DSER 1973 Director of Education for the hike in the fee for sufficient funds for meeting financial implications. The school is asking for a hike from the academic sessions 2018-19 and 2019-20. The fee collected was earlier was Rs. 6953. As per the school, the Director (Education) has accepted the proposal submitted and allowed them to increase the tuition fee by 10% from 1st April 2020. I need to know Rs. 8413 tuition fee is high and how school got approval for the same. But they are not sharing complete document. Looking for valuable directions.