The school underwent major renovations from 2013-2015 and added a Fine Arts/Performing Arts Center in 2018.

[2] As of 2023, GreatSchools gave MHS an overall 5/10 rating, which its data ranges from test scores to diversity, attendance, etc.

[3] Advanced Placement offerings include Art History, Biology, Calculus AB and BC, Chemistry, Computer Science Principles and A, English Language and Composition, English Literature and Composition, Environmental Science, European History, French Language, German Language, Human Geography, Latin Literature, Macroeconomics, Music Theory, Physics C – Mechanics and Electricity/Magnetism, Psychology, Statistics, Spanish Language, Spanish Literature, Studio Art – 2D, 3D, and Drawing, US Government and Politics, US History, and World History.

[4] The McKinney Lions compete in the following sports:[5] On April 1, 2006, a Walkout occurred due to the Comprehensive Immigration Reform Act of 2006.

[7] [1] The zoning for this school includes the areas from South-Downtown McKinney, to areas surrounding Towne Lake, Eldorado Parkway (east of Ridge Road), McKinney National Airport, and Lucas, Texas.