[3] In 1942, during the Second World War, Fremont became a temporary recruitment training ground and around half of the class of 1942 joined the military.

[4] In 1969, a late-night fire occurred in the bell tower of the main building; the 1970 freshman class went to Monta Vista High School in Cupertino while rebuilding was done.

[6] Famous YouTuber and former NASA engineer Mark Rober uploaded a video about the true scale of the Solar System in 2016, with scaled objects laid on starting on Fremont's field and going beyond.

Three classroom buildings that were added in the 1950s on the Fremont Avenue side were demolished and replaced with new instructional and administrative space also in mission style, creating a quadrangle.

Fremont High School DECA has a variety of outstanding achievements, having over 2000 hours of community service as a whole for the 09–10 school year (more than all other Fremont clubs combined) and having sent numerous competitors to represent at the international competitive level.

In 2003–2004 the Fremont varsity cheerleaders took 1st place in every regional competition in which they competed.