Since the mid 1990s it enrolled students of Australian, Korean, Eritrean, Vietnamese, Chinese, Thai, Cambodian, Polish, Italian, Mexican, Colombian, Ghanaian, Cameroonian, and Pakistani ancestries or nationalities.

The school's diversity reflected the massive influx of immigrants to the Northern Virginia region.

In the 1990s, the school's debate and forensics teams gained widespread and even national recognition for their achievements in those fields.

Its academic team has appeared on the local television quiz bowl game show It's Academic, which is broadcast by the local Washington, DC PBS affiliate station and substation, WETA PBS (main) and WETA METRO (substation).

The average SAT score in 2006 for Edison was 1494 (502 in Critical Reading, 505 in Math, and 487 in Writing).