Prosecutors say the alleged assaults took place on the Compton High School campus between Sept. 1, 2008, and April 21, 2010. One of the alleged victims was 15 at the time and the two others were 16.
The 28-year-old Ocana is scheduled to be arraigned Tuesday in Compton Superior Court. He's being held on $390,000 bail.
Ocana faces up to six years in prison if convicted of all counts.