1. Timekeeper t OVER (Time lapse display Lecture Discussion
Start
1st Bell
2nd Bell
3rd Bell
Lecture
OVER
Discussion
(Time lapse display
for lecturers) t
Time lapse graphic display
(Start rd Bell)
Time left until 2nd Bell (for Lecture)
Time left until 3rd Bell
(for Discussion)
Excess time after 3rd Bell

2. Timekeeper (B) t OVER (Time lapse display Lecture Discussion
Start
1st Bell
2nd Bell
3rd Bell
(Time lapse display
for lecturers)
OVER
Lecture
Discussion t
Time lapse graphic display
(Start rd Bell)
Time left until 3rd Bell
(for Lecture and Discussion)
Excess time after 3rd Bell