Student academic and athletic teams, including mock trial, have represented the school at state and national competitions.

Former Jacksonville Mayor and United States Senator Duncan U. Fletcher obtained a federal grant to build the school which bears his name.

In 1997, Fletcher High became a full service school with the construction of the Beaches Resource Center on campus.

The center provides mental health services to the Jacksonville Beaches community, including counseling, behavioral therapy and substance abuse treatment.

[11] Fletcher High offers several varsity sports for each gender, including boys' football, basketball, baseball, lacrosse, soccer, swimming, tennis, track and wrestling alongside girls' basketball, cross country, flag football, lacrosse, soccer, softball, track and volleyball.

[13] In 2017, the boys varsity lacrosse team became first in the county to win a district championship, allowing them to go to state playoffs.

[18] In 1997, Fletcher High won the state championships, qualifying them to travel for Nashville, Tennessee for the national competition.

[18][19] The school also hosts many other clubs including Chess, Model United Nations, Jewish Student Union, Speech and Debate, Brain Brawl, Speak Up, Dungeons & Dragons, etc.

Note: Jewish Student Union did not occur during the 2023-2024 school year with the exception of a Passover Seder.