Victims, both 16-year-old students at James Logan High in Union City, are treated for injuries; 15-year-old student arrested.
Casey Smitherman, who led the Elwood (Ind.) school system, has been charged with insurance fraud.
University is conducting a Title IX investigation into the attacks, which allegedly occurred in the South Russell Residence Hall in Waco.
Another student has been charged in the incident outside Atascocita High School in the Humble district; victim is expected to recover.
Department findings say the university failed for years to accurately report crime statistics, including sex offenses committed by former faculty member Larry Nassar.
Casey Smitherman, superintendent of Elwood Community School Corporation, claimed a 15-year-old boy was her son so he could receive medical treatment.
John Engler had been criticized for demeaning remarks he had made about victims of the university's sexual assault scandal.
Investigation asserts that the university's failure to act enabled faculty member Larry Nassar to continue abusing gymnasts and other women and girls.
Alejandro Vargas Martinez, 15, was on his way to Boone High School when the attack occurred.