Grade 2 · MathematicsAbout 90 minutes
MathematicsGrade 2About 90 minutes

Read five-minute times and distinguish a.m. from p.m.

Suggested multi-session teaching plan.

Ohio learning standards this draft targets

math-2017:2.MD.7

Read the standard text

math-2017:2.MD.7 Tell and write time from analog and digital clocks to the nearest five minutes, using a.m. and p.m.

Provisional targets. Clause-by-clause educational review is still pending.

Section 1 · LearnLearn the idea
Morning example: 9:25 a.m. The minute hand points to 5 (25 minutes), and the hour hand is partway from 9 toward 10. Without the morning context, these same hands could also represent 9:25 p.m.Morning example: 9:25 a.m. The minute hand points to 5 (25 minutes), and the hour hand is partway from 9 toward 10. Without the morning context, these same hands could also represent 9:25 p.m.1234567891011129:25
Morning example: 9:25 a.m. The minute hand points to 5 (25 minutes), and the hour hand is partway from 9 toward 10. Without the morning context, these same hands could also represent 9:25 p.m.

Learning goal: Tell and write time to the nearest five minutes on analog and digital clocks, and use context to distinguish a.m. and p.m. An analog clock's two main hands work together. Reading the minute hand alone is not enough to identify the hour.

The long minute hand completes one full turn in sixty minutes. Its numbered positions mark five-minute groups: at 1 it indicates five minutes after the hour, at 2 ten, at 3 fifteen, continuing through 11 for fifty-five. At 12 it indicates zero minutes after the hour on the new cycle. Count the five-minute intervals from 12 rather than treating the numeral 5 as five minutes.

The shorter hour hand moves gradually as the minutes pass. At 9:25, it is between 9 and 10, closer to 9. It should not point exactly at 9 except at 9:00. The illustrated hand position includes this partial movement, so the model does not teach a clock with an hour hand that stays frozen for the whole hour.

Read the example by locating the shorter hand first: the time is after nine and before ten. The long hand points to 5, which is twenty-five minutes past the hour. Write 9:25. The colon separates hour and minute information; the 25 is not another hour value.

For another example, the minute hand at 11 indicates fifty-five minutes. If the hour hand is just before 4, the time is 3:55, not 4:55. The hour has not yet reached four. At 4:00 the minute hand reaches 12 and the hour hand reaches 4.

The same analog hand positions occur twice in each day: once in the a.m. half and once in the p.m. half. Morning 9:25 is 9:25 a.m.; evening 9:25 is 9:25 p.m. A clock face with no day context cannot independently tell which one is meant. The illustration's caption supplies the morning context; the hands alone do not reveal morning.

Use noon and midnight carefully. By the usual U.S. convention, noon is written 12:00 p.m. and midnight 12:00 a.m.; saying “noon” or “midnight” avoids any confusion. For second-grade routines, compare familiar morning and afternoon/evening events while being clear that households have different schedules. A picture of someone eating does not by itself establish a.m. or p.m.; the stated context must supply that information.

Practice translating both ways. Read an analog face and write a digital time with context, then set a teaching clock for a supplied digital time. Setting the hour hand between numerals is part of the task. A learner who only matches a printed digital label beneath a clock has not yet demonstrated independent clock reading.

Section 2 · ModelWork through the examples

Worked example 1: Read the illustrated morning time. The minute hand at 5 means twenty-five minutes. The hour hand is between 9 and 10. With the supplied morning context, write 9:25 a.m.

Worked example 2: Avoid rounding the hour up. At 3:55, the short hand is close to 4 but still before it. The minute hand at 11 supplies fifty-five. Reading the nearest hour numeral alone would give the wrong hour.

Worked example 3: Supply context. An evening activity begins at 7:10. Write 7:10 p.m. An identical clock face during a stated morning activity would be 7:10 a.m. The suffix follows the event's stated time of day.

Section 3 · DoPractice, demonstrate, and explain

Guided practice: Count around the clock in five-minute intervals. Set several times, including just after and just before an hour, and explain both hand positions. Add morning, afternoon or evening context only when it is supplied.

Independent tasks: Read unfamiliar analog clocks at five-minute marks, write digital times and set a clock from a digital prompt. Include a.m./p.m. examples and one clock with insufficient context where the learner should say that the half of the day is unknown.

Feedback: If the hour is rounded up, ask which numeral the hand has passed and which it has not yet reached. If the numeral 5 is read as five minutes, count five-minute intervals from 12. Credit precise hand reasoning rather than memorized picture matching.

Section 4 · Check7-question lesson practice test

An adult may read the prompts aloud. Answer independently with words, objects, drawings or a demonstration before opening the answer guide. Award 1 point for a correct result or claim and 1 point for a matching explanation or demonstration; where a question asks only for a result (a corrected sentence, a spelling, a count), a fully correct result earns both points, and the answer guide shows what a complete response contains. Record prompting separately. The total (two points per question) is local practice feedback, not an Ohio proficiency level.

Problem 1

How many minutes after the hour does the long hand at 8 represent?

Show worked solution

Forty minutes: eight groups of five from 12.

Problem 2

Read the illustrated clock using its morning context.

Show worked solution

9:25 a.m. The short hand is between 9 and 10 and the long hand indicates twenty-five minutes.

Problem 3

The minute hand is at 10 and the hour hand is just before 7. What time is it?

Show worked solution

6:50. The hour hand has not reached seven yet.

Problem 4

Can an unlabeled analog face alone distinguish 9:25 a.m. from 9:25 p.m.?

Show worked solution

No. Those times have the same hand positions; context is needed.

Problem 5

How are noon and midnight usually written?

Show worked solution

By the usual convention, noon is 12:00 p.m. and midnight is 12:00 a.m. The words noon and midnight are also clear.

Problem 6

Describe where both hands point at 4:35 p.m.

Show worked solution

The minute hand points to 7 (thirty-five minutes), and the hour hand is a little more than halfway from 4 toward 5. The p.m. comes from the supplied context, not from a different hand arrangement.

Problem 7

Practice starts after school, when the hour hand is just past 3 and the minute hand points to 2. Write the time with a.m. or p.m.

Show worked solution

3:10 p.m. The minute hand at 2 shows ten minutes, and after school is in the afternoon.