A traditional bell schedule has six to eight shorter periods (about 45–55 minutes) every day; a block schedule has fewer, longer periods (about 80–90 minutes). In an A/B block schedule classes alternate days; in a 4×4 block students take four courses a day for one term. Rotating and two-week timetables vary the order so no subject is always first or last. All can be built in the timetable maker.
Traditional bell schedule
Every class meets every day for the same short period, usually with passing time between bells. It is simple to understand and gives daily contact with every subject, which suits primary school, languages and mathematics. The downside is less time for labs, projects and deep discussion, and more transitions in a day. To make one, set the first bell and period length and click Auto-fill period times.
A/B block schedule
Students take the same seven or eight courses all year but meet only half of them each day for longer blocks — A days and B days alternate. Teachers gain time for labs and practical work and students carry fewer subjects per night. Choose the A/B block schedule template or the “A/B rotating days” format.
4×4 block schedule
Four long blocks a day, with each course completed in one term (semester), then four new courses. It allows students to finish more credits a year, but gaps between sequential courses, such as a language, can be long.
Rotating and drop schedules
In a rotating schedule the order of periods shifts each day, so a class is not always met at 8 a.m. when students are tired; a drop schedule drops one period each day in rotation. Use the “Rotating 6-day cycle” format and rename the columns Day 1 to Day 6.
Two-week timetable (Week A / Week B)
Common in the UK and Australia, a fortnightly timetable lets schools allocate an odd number of lessons — such as three periods over two weeks. Choose “Two-week rotation · 10 days” and label the columns Week A and Week B.
Comparison at a glance
| Type | Period length | Classes per day | Best for |
|---|---|---|---|
| Traditional bell schedule | 40–55 min | 6–8 | Daily practice, younger students |
| A/B block | 80–90 min | 3–4 | Labs, projects, fewer transitions |
| 4×4 block | 85–90 min | 4 | Accelerated credits |
| Rotating / drop | 45–60 min | 5–7 | Fair time-of-day for every subject |
| Two-week | 50–60 min | 5–6 | Uneven lesson allocations |
Make a bell or block schedule: Open the timetable maker →
Frequently asked questions
What is a bell schedule?
A bell schedule lists the start and end time of every period, break and lunch in the school day. It is the US term for a daily school timetable.
What is a block schedule in high school?
A block schedule replaces many short periods with three or four long blocks of about 80–90 minutes. A/B and 4×4 are the two most common versions.
Is block scheduling better?
Research is mixed. Long blocks help labs and project work and reduce transitions; daily short periods suit subjects that need frequent practice. Many schools combine both.
How do I make a bell schedule?
Set the first bell, period length, passing time or breaks and lunch in the timetable maker, click Auto-fill period times and print it in 12-hour or 24-hour format.
More in this topic cluster
Make a school, teacher, exam or study timetable with bell times, breaks and auto-generate.
How to Make a School TimetablePeriods, breaks, teachers and subject balance, step by step.
School Timetables Around the WorldSchool days, lesson length and breaks by country.
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