CMCSS Adult High School, 430 Greenwood Ave.: a high school diploma program for residents 17 and older, 107 students this fall.
Last checked Oct. 17, 2026. Sources: adulthigh.cmcss.net, Clarksville-Montgomery County School System, Tennessee Department of Education data files and the NCES school directory.
The CMCSS Adult High School lets Montgomery County residents earn a high school diploma, even if they already hold a GED or HiSET. It meets at 430 Greenwood Ave., the same address as the district’s Enrollment Center.
Who to call
- Front office: 931-542-5043, 430 Greenwood Ave., Clarksville, TN 37040
- School website: adulthigh.cmcss.net
- Enrolling a new student: the CMCSS Enrollment Center, 931-542-5078, 430 Greenwood Ave., or start online through the district registration page
- District office: 931-648-5600, 621 Gracey Ave.
| Address | 430 Greenwood Ave., Clarksville, TN 37040 |
| Phone | 931-542-5043 |
| Grades | Diploma program for residents 17 and older |
| School day | 7:30 a.m. to 2:15 p.m. |
| District | Clarksville-Montgomery County School System (CMCSS) |
| Students, Oct. 17, 2026 | 107 |
Principal
Principal Kimberly Sigears, according to the school’s staff directory.
Enrollment and teachers
- This fall: 107 students on Oct. 17, 2026, day 44 of the school year, in the district’s enrollment count.
- State count: 99 students in the 2024-25 school year, in the Tennessee Department of Education’s school profile file.
- Federal count: 147 students in the 2023-24 school year, according to the NCES directory, which lists no teacher count for the school.
State report card
The state’s 2024-25 letter grade file lists the Adult High School as not eligible for a letter grade, and the state’s graduation and test files publish no figures for it.
Attendance zone and feeder schools
The Adult High School has no attendance zone. Any person who does not have a high school diploma can apply if they are 17 or older, the school says on its about page: “It does not matter why you left school, how long ago, or how much work you need to complete to earn your diploma.” Call the school at 931-542-5043 to start.
Calendar and bell times
From the board-approved CMCSS 2026-27 calendar (PDF):
- Tuesday, Nov. 3: staff development, no school for students
- Wednesday, Nov. 11: Veterans Day, no school
- Nov. 23-27: Thanksgiving break
- Thursday, Dec. 17: half day for students, end of the second nine weeks
- Dec. 18 to Jan. 4: winter break; students return Wednesday, Jan. 6
- March 15-19, 2027: spring break
Bell times, from the district’s list of schools: regular days run 7:30 a.m. to 2:15 p.m., and half days 7:30 a.m. to 11:30 a.m.
More on Clarksville schools
- The school’s website and the CMCSS list of high schools
- Every public school in Clarksville
- Our Clarksville schools guide for enrollment documents, the full calendar and school board meetings
Frequently asked questions
Who can attend the CMCSS Adult High School?
Any Montgomery County resident 17 or older without a high school diploma can apply, even with a GED or HiSET, according to the school.
Where is the CMCSS Adult High School?
At 430 Greenwood Ave. in Clarksville, the same address as the CMCSS Enrollment Center. The school’s phone number is 931-542-5043.
What are the CMCSS Adult High School’s hours?
CMCSS lists a regular day of 7:30 a.m. to 2:15 p.m. and half days of 7:30 a.m. to 11:30 a.m.
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