HENLEY-ON-KLIP, SOUTH AFRICA — Oprah Winfrey says the first graduation at her elite school for South African girls is a time for celebration, and for contemplating how she could have done it better.

Winfrey said Saturday’s graduation ceremony is a victory. But she says her future philanthropy in Africa will support existing institutions instead of spending millions to start from scratch.

Of the 75 students who started at her school in 2007, all 72 who graduated are headed to universities in South Africa and the United States.