Saved by the Bell:  Hours and Schedules

A female student wearing facepainting and a cat-ear headband smiles at the camera.

The tabs below feature the various bell schedules observed at Centennial High School during the school year.

For your convenience, we will also post fall and spring exam schedules as well as special schedules used for testing such as the PSAT, the fall senior ACT retake, the spring junior ACT, Williamson County CCE testing, and state EOC testing.

Regular School Hours:  7:40 AM – 2:47 PM

1st Period          7:40 AM – 8:33 AM
2nd Period        8:38 AM – 9:26 AM
Break                 9:26 AM – 9:34 AM
3rd Period         9:34 AM – 10:22 AM
4th Period         10:27 AM – 11:15 AM
5th Period         11:20 AM -12:10 PM
Lunch and Enrichment
11:45 PM  Enrichment Ends
6th Period          12:15 PM – 1:03 PM
7th Period          1:08 PM  -1:55 PM
8th Period          2:00 PM – 2:47 PM

Power Monday Hours  8:25 AM – 2:47 PM

1st Period 8:25 AM – 9:10 AM
2nd Period 9:15 AM – 9:57 AM
3rd Period 10:02 AM- 10:44 AM
4th Period 10:49 AM- 11:31 AM
5th Period 11:36 AM- 12:26 PM   Lunch & Enrichment
12:01 Enrichment Ends
6th Period 12:31 PM- 1:11 PM
7th Period 1:16 PM- 1:58 PM
8th Period 2:03 PM- 2:47 PM

Half Day of School Hours 7:40 AM – 11:15 AM

Homeroom 7:40 AM – 7:50 AM
1st Period  7:55 AM- 8:19 AM
2nd Period 8:24 AM- 8:48 AM
3rd Period  8:53 AM – 9:17 AM
4th Period  9:22 AM – 9:46 AM
6th Period  9:51 AM- 10:15 AM
7th Period 10:20 AM – 10:44 AM
8th Period 10:49 AM- 11:15 AM

Two-Hour Delay Hours 9:40 AM – 1:33 PM

1st Period 9:40 AM – 10:15 AM
2nd Period 10:20 AM – 10:52 AM
3rd Period 10:57 AM – 11:29 AM
Lunch 11:29 AM – 12:19 PM
4th Period 12:24 PM – 12:56 PM
6th Period 1:01 PM – 1:33 PM
7th Period 1:38 PM – 2:10 PM
8th Period 2:15 PM – 2:47 PM

Activity/Pep Rally Day Hours 7:40 AM – 2:47 PM

1st Period 7:40 AM – 8:25 AM
2nd Period 8:30 AM – 9:10 AM
3rd Period 9:15 AM – 9:55 AM
4th Period 10:00 AM – 10:40 AM
6th Period 10:45 AM- 11:25 AM
LUNCH 11:30 AM – 12:20 PM
7th Period 12:25 PM- 1:05 PM
8th Period 1:10 PM- 1:50 PM
Participants released 1:50 PM
Students released 1:55 PM- 2:05 PM
Pep rally 2:05 PM – 2:47 PM

You may download printable copies of the spring schedules as soon as they become available.  We will post EOC, AP, and final exams in April 2020.

Centennial High School
Spring Semester Exam Policies

  • No exam/s will be given early or at a time different from the exam schedule.
  • Seniors who have an average of 91 or higher, no more than 6 absences per class per semester through Monday, December 17 (pre-approved days included), and have not been suspended, including ISS, are exempt from exams. The 3 points (Honors) and 5 points (AP) will be added to the semester grade prior to notification of the exam exemption.
  • All students are expected to be at school all day during the examination schedule. Students who are not present, including students exempt from exams, will be counted as absent.
  • A student who does not take a required exam will not receive credit for the course until the exam is taken. Any student who is not exempt and misses an exam will receive an “I” as their exam grade.  The “I” can only be removed when the student takes the exam.  The grade will not be changed to “0” at any point unless the student physically sits for the exam and does not correctly answer any test item.
  • All students will remain in their classrooms during the entire exam period.  No student will be permitted to leave early during an exam period.
Students in art class work on clay projects at art tables around the room.