Telling time to the minute (age 9+)
PROCEDURALSolve problems involving converting between units of time (hours↔minutes, minutes↔seconds, years↔months, weeks↔days)
Mastery Evidence
- Convert 3 hours 25 minutes to 205 minutes
- A programme lasts 150 seconds — express in minutes and seconds
- How many days are in 8 weeks and 3 days?
Assessment Prompt
“If [child] needs to convert 2 hours 35 minutes into just minutes, can they do it — and then convert 180 seconds into minutes and seconds?”
Prerequisites2
- Converting measurement unitshardAges 8—9
- Numbers on a number linehardAges 8—9
Show full prerequisite tree
- Calculating with measurements hard
Measuring in standard units is prerequisite to converting between units
- Comparing and ordering measurements hard
Extends comparing/ordering measures to adding/subtracting them
- Choosing measurement units hard
Comparing and ordering measurements with symbols requires being able to measure in standard units
- Capacity and volume hard
Using standard units for capacity extends from beginning to measure capacity
- Comparing Capacity hard
Measuring capacity with units requires first being able to compare capacities
- Measurable Attributes of Objects hard
Comparing capacity requires understanding capacity as a measurable attribute
- Measuring length and height (age 5+) hard
Using standard units for length extends from beginning to measure length
- Comparing Lengths & Heights hard
Measuring length with units requires first being able to compare lengths directly
- Measurable Attributes of Objects hard
Comparing lengths/heights requires first identifying length as a measurable attribute
- Measuring mass and weight (age 4+) hard
Measuring mass with units requires first being able to compare masses directly
- Measurable Attributes of Objects hard
Comparing mass/weight requires first identifying mass as a measurable attribute
- The two digits of a two-digit number hard
Comparing two-digit numbers using PV requires understanding tens and ones
- A Ten Is Ten Ones hard
Understanding tens and ones place value requires the concept of 10 as a bundle
- The teen numbers hard
Understanding 10 as a bundle builds on understanding teen numbers as 'a ten and some ones'
- How Many in Total? hard
Understanding tens-and-ones composition requires cardinality — knowing numbers represent quantities
- One-to-one counting hard
Cardinality principle builds on one-to-one correspondence — you must count correctly to know the last number tells 'how many'
- Reading and writing numbers to 20 hard
Composing/decomposing teen numbers requires reading and writing those numerals
- How Many in Total? hard
Reading/writing numerals 0–20 requires understanding that numerals represent quantities (cardinality)
- One-to-one counting hard
Cardinality principle builds on one-to-one correspondence — you must count correctly to know the last number tells 'how many'
- Writing digits 0-9 hard
Writing numerals requires the motor skill of forming digits 0-9 (taught in English handwriting)
- The teen numbers hard
General two-digit place value extends from understanding teen number composition
- How Many in Total? hard
Understanding tens-and-ones composition requires cardinality — knowing numbers represent quantities
- One-to-one counting hard
Cardinality principle builds on one-to-one correspondence — you must count correctly to know the last number tells 'how many'
- Reading and writing numbers to 20 hard
Composing/decomposing teen numbers requires reading and writing those numerals
- How Many in Total? hard
Reading/writing numerals 0–20 requires understanding that numerals represent quantities (cardinality)
- One-to-one counting hard
Cardinality principle builds on one-to-one correspondence — you must count correctly to know the last number tells 'how many'
- Writing digits 0-9 hard
Writing numerals requires the motor skill of forming digits 0-9 (taught in English handwriting)
- Two written numerals between 1 and 10 soft
Comparing two-digit numbers extends from comparing single-digit written numerals
- Comparing groups: more or fewer soft
Comparing written numerals is the symbolic form of comparing quantities — conceptual comparison helps but isn't strictly required
- Counting objects to 20 soft
Counting a set helps when comparing groups, but younger children (GB age 4) can compare using matching without formal counting to 20
- One-to-one counting hard
Cardinality principle builds on one-to-one correspondence — you must count correctly to know the last number tells 'how many'
- Choosing measurement units hard
Extends Y2 standard unit measurement to include mm and to add/subtract measures
- Capacity and volume hard
Using standard units for capacity extends from beginning to measure capacity
- Comparing Capacity hard
Measuring capacity with units requires first being able to compare capacities
- Measurable Attributes of Objects hard
Comparing capacity requires understanding capacity as a measurable attribute
- Measuring length and height (age 5+) hard
Using standard units for length extends from beginning to measure length
- Comparing Lengths & Heights hard
Measuring length with units requires first being able to compare lengths directly
- Measurable Attributes of Objects hard
Comparing lengths/heights requires first identifying length as a measurable attribute
- Measuring mass and weight (age 4+) hard
Measuring mass with units requires first being able to compare masses directly
- Measurable Attributes of Objects hard
Comparing mass/weight requires first identifying mass as a measurable attribute
- Time Units and Calendar Facts hard
Knowing seconds/minute, days/month etc. is prerequisite to unit conversion problems
- Number of minutes in an hour hard
Extends knowing minutes in an hour to seconds in a minute and days in months
- Telling time to the minute hard
Knowing 60 min = 1 hour and 24 hours = 1 day extends from measuring time in hours/minutes/seconds
- Comparing durations hard
Measuring time in units requires understanding time comparison language first
- Comparing Time Durations hard
Prior duration comparison experience feeds into elapsed-time problem solving
- Telling Time: Hours and Half Hours hard
Telling time to 5 minutes extends from telling time to the hour and half past
- How Many in Total? hard
Reading/writing numerals 0–20 requires understanding that numerals represent quantities (cardinality)
- One-to-one counting hard
Cardinality principle builds on one-to-one correspondence — you must count correctly to know the last number tells 'how many'
- Writing digits 0-9 hard
Writing numerals requires the motor skill of forming digits 0-9 (taught in English handwriting)
- Division as equal sharing hard
Finding a half requires equal sharing into 2 groups — a division concept
- Subtraction as taking away or separating hard
Division as equal sharing/grouping requires understanding subtraction as taking away/separating
- How Many in Total? hard
Understanding subtraction as taking away requires knowing numbers represent quantities (cardinality)
- One-to-one counting hard
Cardinality principle builds on one-to-one correspondence — you must count correctly to know the last number tells 'how many'
- Telling time to the minute hard
Telling time on a clock requires understanding hours and minutes as time units
- Comparing durations hard
Measuring time in units requires understanding time comparison language first
- Sequence intervals of time hard
Extends comparing time intervals to recording in seconds, minutes, hours
- Comparing durations hard
Measuring time in units requires understanding time comparison language first
- Number of minutes in an hour hard
Extends knowing minutes in an hour to seconds in a minute and days in months
- Telling time to the minute hard
Knowing 60 min = 1 hour and 24 hours = 1 day extends from measuring time in hours/minutes/seconds
- Comparing durations hard
Measuring time in units requires understanding time comparison language first
- Telling time to the minute (age 8+) hard
Must read time to nearest minute before solving elapsed time problems
- Telling time to the minute (age 7+) hard
Tell time to 5 minutes is prerequisite to telling time to nearest minute
- Telling Time: Hours and Half Hours hard
Telling time to 5 minutes extends from telling time to the hour and half past
- How Many in Total? hard
Reading/writing numerals 0–20 requires understanding that numerals represent quantities (cardinality)
- One-to-one counting hard
Cardinality principle builds on one-to-one correspondence — you must count correctly to know the last number tells 'how many'
- Writing digits 0-9 hard
Writing numerals requires the motor skill of forming digits 0-9 (taught in English handwriting)
- Division as equal sharing hard
Finding a half requires equal sharing into 2 groups — a division concept
- Subtraction as taking away or separating hard
Division as equal sharing/grouping requires understanding subtraction as taking away/separating
- How Many in Total? hard
Understanding subtraction as taking away requires knowing numbers represent quantities (cardinality)
- One-to-one counting hard
Cardinality principle builds on one-to-one correspondence — you must count correctly to know the last number tells 'how many'
- Telling time to the minute hard
Telling time on a clock requires understanding hours and minutes as time units
- Comparing durations hard
Measuring time in units requires understanding time comparison language first
Unlocks2
- Egyptian Timelines and MapssoftAges 9—10
- Reading tablessoftAges 9—10