Common Core Time Standards by Grade, Explained

Time appears in the Common Core in grades 1 through 5, always inside the Measurement and Data domain, and in only five standards. Three of them are about reading a clock, two are about converting units. Kindergarten has no time-telling standard at all. Everything below quotes what each standard actually requires, what it does not require, and one check per grade you can run in under a minute.

The whole sequence in one table

These are the Common Core time standards in full. If a skill is not in this table, no standard is asking for it.

Grade	Code	What it requires
Kindergarten	None	No time-telling standard exists. K.MD.A.1 covers measurable attributes such as length and weight, not time.
Grade 1	1.MD.B.3	Tell and write time in hours and half-hours using analog and digital clocks.
Grade 2	2.MD.C.7	Tell and write time from analog and digital clocks to the nearest five minutes, using a.m. and p.m.
Grade 3	3.MD.A.1	Tell and write time to the nearest minute, measure time intervals in minutes, and solve word problems involving addition and subtraction of time intervals in minutes.
Grade 4	4.MD.A.1 and 4.MD.A.2	Know the relative sizes of hours, minutes and seconds, express a larger unit in terms of a smaller one, and solve word problems involving intervals of time.
Grade 5	5.MD.A.1	Convert among different-sized units within one measurement system and use those conversions in multi-step real-world problems.

Kindergarten: there is no standard, and that is the point

Kindergarten teachers regularly get asked why their students cannot read a clock. The answer is that no standard asks them to. K.MD.A.1 is about describing measurable attributes of objects, with length and weight as the examples; time is not among them.

What is genuinely useful at this age is sequence and vocabulary: ordering the events of the day, using before and after correctly, and matching activities to morning, afternoon and night. None of that is assessed, and all of it makes 1.MD.B.3 dramatically easier the following year. The groundwork is laid out in the guide to what three-, four- and five-year-olds can do with time, and there is a set of routine-based clock introductions for kindergarten for the children who are already asking about the numbers.

Grade 1: hours and half-hours, nothing else

1.MD.B.3 asks students to tell and write time in hours and half-hours using analog and digital clocks. Read that literally. It is twelve o'clock times and twelve half-past times, twenty-four in total, in both directions: reading a face and writing the digital form.

Quarter past and quarter to are not in this standard. Neither is a.m. or p.m., which arrives in grade 2, nor elapsed time, which arrives in grade 3. Teaching those early is not forbidden, but do it only after every student has the twenty-four times secure, because a class that is shaky on half past and gets quarter to anyway ends the year worse off.

The most common cause of failure is hand confusion rather than anything conceptual, and the fix is to teach the hour hand alone for a week before the minute hand appears at all. The full four-week sequence, along with the three errors that produce most wrong answers, is in the walkthrough of how to build hour and half-hour reading across a term.

Grade 2: five minutes, plus a.m. and p.m.

2.MD.C.7 requires telling and writing time from analog and digital clocks to the nearest five minutes, using a.m. and p.m. Two new demands sit inside that sentence. Students now need to skip-count by fives around the face, which is why this standard is usually taught after the fives multiplication work rather than before it. And they need a.m. and p.m., which is a labeling skill rather than a clock-reading one.

The number every second grader must internalize is that the 3 on the face means 15 minutes, the 4 means 20, and so on. Writing the minute counts outside the face in a second color, and leaving them there for a month, does more than any worksheet. Graduated practice on the five-minute readings is collected under counting round the face in fives.

For the a.m. and p.m. half, the two times that separate real understanding from guessing are noon and midnight. Noon is 12:00 p.m. and midnight is 12:00 a.m., which means 12:15 a.m. is the middle of the night. Teach those two explicitly rather than assuming, and use sorting tasks that force a decision, such as the ones gathered under sorting everyday events into morning and afternoon.

Grade 3: to the nearest minute, and intervals in minutes

3.MD.A.1 has three parts: tell and write time to the nearest minute, measure time intervals in minutes, and solve word problems involving addition and subtraction of time intervals in minutes. The last clause is the one that decides your unit plan.

Note the repeated phrase "in minutes". Third grade elapsed time is measured in minutes, not in hours and minutes, so the intended answer to a problem running from 2:15 to 3:45 is 90 minutes. Reporting it as 1 hour 30 minutes is not wrong and most classrooms accept both, but the standard's language is minutes, and the number line diagram named in the standard is the representation to teach.

Reading to the nearest minute is a smaller step than it looks if students already skip-count by fives: they land on the nearest five and count on, so the long hand just past the 9 gives 45, then 46, 47. The hour is the trap, because at 3:47 the hour hand nearly touches the 4. The mechanics of intervals are covered in the explainer on what an interval of time actually measures, and the classroom sequence with checked examples is in the guide to teaching minute reading and interval problems in grade 3.

Grades 4 and 5: conversion, not clock reading

After grade 3, the standards stop asking students to read clocks. 4.MD.A.1 asks them to know the relative sizes of measurement units, and for time it names exactly three: hours, minutes and seconds. Within that standard, students express a measurement in a larger unit in terms of a smaller one, so 3 hours becomes 180 minutes and 2 hours 15 minutes becomes 135 minutes.

Two things are worth flagging. Days, weeks and years are not named in 4.MD.A.1 for time, even though most textbooks teach them alongside; teaching them is sensible, but do not treat them as the assessed content. And the reverse direction, minutes into hours, is not what 4.MD.A.1 asks for either. Elapsed time word problems in fourth grade live in 4.MD.A.2, which covers problems involving intervals of time among other quantities. A unit built around both, with the schedule and conversion tasks that hit them, is set out in the guide to conversion and schedule work for grade 4.

5.MD.A.1 asks students to convert among different-sized standard measurement units within one system and use those conversions in solving multi-step real-world problems. For time that means moving in both directions and handling mixed and fractional quantities: 3 and a half hours is 210 minutes, and a 4 hour 45 minute flight is 285 minutes. The word that matters in this standard is multi-step, so a single conversion is no longer the whole task.

Four things the standards do not say

• There is no kindergarten clock standard. Any curriculum map claiming K.MD covers telling time has invented it.
• The 24-hour clock is not in the Common Core at any grade. It is worth teaching because students meet it on phones and ovens, but it is enrichment, not requirement.
• Quarter past and quarter to are never named. They are absorbed into the five-minute readings of 2.MD.C.7, so the vocabulary is a teaching choice rather than a standard.
• Elapsed time is not a K to 5 thread. It appears in 3.MD.A.1 and again in 4.MD.A.2, and nowhere else, which is why students who miss it in third grade often reach fifth without ever having been retaught.

One check per grade, under a minute each

1. Grade 1. Set a clock to 4:30 and ask for the time, then ask the student to write it. Both halves are required by the standard, and children frequently pass one and fail the other.
2. Grade 2. Set a clock to 3:45 and ask for the time; then ask whether school lunch happens at 12:00 a.m. or 12:00 p.m. The correct answer is p.m., and a wrong answer here is the single most common grade 2 gap.
3. Grade 3. "You start reading at 2:10 and finish at 2:35. How long did you read?" The answer is 25 minutes. Ask for the number line drawing, not just the number.
4. Grade 4. "How many minutes are in 4 hours?" The answer is 240. Any answer smaller than 4 means the student divided instead of multiplying.
5. Grade 5. "A movie is 2 hours 20 minutes long and starts at 6:45 p.m. How many minutes long is it, and when does it end?" The answers are 140 minutes and 9:05 p.m. This is the multi-step version, and a student who gets the first part and not the second has met 4.MD.A.1 but not 5.MD.A.1.

What to do when a grade is not met

Drop one standard, not several. A fourth grader who cannot convert hours to minutes usually still reads a clock fine, so reteach 4.MD.A.1 rather than restarting at grade 2. A third grader who cannot handle intervals but reads to the minute needs the number line, not more clock reading. The order of the five standards is the order of the reteach, and each one genuinely depends on the one before it.

Games earn their place here because standards work needs volume that worksheets cannot supply without goodwill running out. Bingo adapts to every grade in this list by changing only what is in the squares: clock faces at hours for grade 1, five-minute readings for grade 2, intervals for grade 3, and durations in mixed units for grades 4 and 5. You can build a class set of cards at whichever level you need, or let the browser handle the calling while you watch how students are working. For students who need the steps broken down further before any of this helps, the piece on breaking time skills into smaller teachable steps is the place to start.