Classroom timers by length

Each page opens a visual timer already set to that length. Pick one, press Start, then Show to class. Every timer can be changed afterwards, so these are starting points rather than limits.

Timer	Turns yellow / red	A typical use
10 Second Timer	0:05 / 0:02	Wait time after a question, so every student has a moment to think before hands go up.
15 Second Timer	0:08 / 0:03	Mini whiteboards: write your answer, then hold it up when the timer ends.
20 Second Timer	0:10 / 0:04	Hand washing before snack or lunch: twenty seconds of scrubbing is the length health agencies commonly recommend.
30 Second Timer	0:15 / 0:06	Quick write: one sentence about what you just learned.
45 Second Timer	0:23 / 0:09	Movement intervals during a brain break: 45 seconds of jumping jacks, then rest.
1 Minute Timer	0:30 / 0:12	Lining up for lunch, recess or a specials class. The board tells students what to do while the disc shows how long they have.
90 Second Timer	0:45 / 0:18	Turn and talk: about 45 seconds for each partner.
2 Minute Timer	1:00 / 0:24	Partner talk: one minute each. The 1-minute warning chime lands exactly at the halfway swap.
3 Minute Timer	1:30 / 0:36	End-of-day or end-of-centers clean-up, with a job for each table.
4 Minute Timer	2:00 / 0:48	A quick snack in younger grades, so the room is ready when the disc runs out.
5 Minute Timer	2:30 / 1:00	A brain break between lessons: dance, stretch or a calm breathing video.
6 Minute Timer	3:00 / 1:12	Quick write or journal response to a prompt.
7 Minute Timer	3:30 / 1:24	Partner reading, swapping readers every page.
8 Minute Timer	4:00 / 1:36	Independent practice after a mini-lesson.
9 Minute Timer	4:30 / 1:48	A focused group task with a single product, such as a poster or a shared answer.
10 Minute Timer	5:00 / 2:00	Group work with roles, ending with a share-out.
11 Minute Timer	5:30 / 2:12	Building reading stamina one minute at a time: yesterday 10, today 11.
12 Minute Timer	6:00 / 2:24	Four 12-minute centers fit a one-hour block with 1 minute switches (51 minutes total), leaving time to launch and wrap up.
13 Minute Timer	6:30 / 2:36	Project work time with a clear stopping point.
14 Minute Timer	7:00 / 2:48	Independent math practice while you pull a small group.
15 Minute Timer	7:30 / 3:00	Writing workshop drafting time.
16 Minute Timer	8:00 / 3:12	Read a passage, then answer questions about it.
17 Minute Timer	8:30 / 3:24	A lab step with set-up and clean-up built in.
18 Minute Timer	9:00 / 3:36	Independent work with a check-in at the 1 minute warning chime.
20 Minute Timer	10:00 / 4:00	Silent or independent reading.
25 Minute Timer	12:30 / 5:00	A focus block for older students, followed by a 5-minute break (the pattern many study routines use).
30 Minute Timer	15:00 / 6:00	A long work period on a project.
35 Minute Timer	17:30 / 7:00	A test section in a 45-minute class, leaving time for directions and collection.
40 Minute Timer	20:00 / 8:00	A test or exam section.
45 Minute Timer	22:30 / 9:00	A full test in a class period.
50 Minute Timer	25:00 / 10:00	A 50-minute exam or a full class period.
55 Minute Timer	27:30 / 11:00	A one-hour block that leaves five minutes to pack up.
60 Minute Timer	30:00 / 12:00	A long test or standardized test practice section.
90 Minute Timer	45:00 / 18:00	Block scheduling: a full 90-minute class.
2 Hour Timer	1:00:00 / 24:00	Long exams and practice tests.

Timers for routines

Need an odd length like 7 minutes 30 seconds? Open the classroom timer and type the minutes and seconds.