[5] Students from Dale and Chrisney merged in the new building that opened in January 1973 and was dedicated in November that year.

[1] The school was built on part of the land grant originally owned by Thomas and Nancy Hanks Lincoln.

[9] In May 2020, long-time principal Nick Alcorn was honored on his retirement, following 32 years at Heritage Hills.

[12] The state's Core 40 Curriculum was implemented beginning with the class of 2009,[13] requiring more specific academic coursework in quantitative reasoning and language arts.

[14] Advance Placement and Career Technical courses are also offered, as well as articulation agreements for transfer coursework with Ivy Tech Community College and Vincennes University.