The district's first schoolhouse, which opened in 1888, was a part of the
Brooke School District. The Rialto school district was formed out of the Brooke district on April 9, 1891.
Holocaust writing assignment controversy In 2014, the school district and its interim superintendent were criticized for introducing a writing assignment which asked students to argue that the Holocaust did not happen. This assignment was given to all 8th grade students. Students were provided with a very limited selection of sources, including material from a known
Holocaust denial website, but were not allowed access to the internet or other materials that show that this material had been discredited. A follow-up investigation by
The San Bernardino Sun found that (contrary to the district's initial claims) at least 50 of the 2,000 students taking the test ended up concluding that the Holocaust did not occur. The district has apologized and promised not to repeat the exercise, and also sent all the eighth graders to visit the
Museum of Tolerance in
Los Angeles, a museum known for its exhibits about the Holocaust. , Rialto Unified School District ==Wrestling==