Question for Eveline High School

Could you give me any information when the following girls attended Eveline High School, Martha Vermaak, Marie Vermaak, Emma Alice Vermaak and Freda Vermaak. I know that they were orphans and were in Daisyfield Orphanage for some years but I think they attended Eveline after leaving the orphanage at 15 years.It would have been in the 1920s