Use analogue and digital 12-hour clocks Analogue Some Jewish clocks rotate anti-clockwise. There is a 24-hour analogue Know the number of seconds in a minute, minutes in an hour, hours clock at Greenwich observatory. Digital in a day, and the number of days in each week, month, year and leap year 24 clock notation using four digits. Any time before 10:00 a.m. uses a 12-hour Know the value of all British coins and notes zero as the second hour digit, for example 9:15 a.m. is written as ‘09:15’. Know the number of pence in a pound 24-hour Noon is 12:00 and midnight is 00:00 Calculate the duration of time for a given event or task Second, Minute, Hour NCETM: Day, Week, Month, Year Pound (£) Common approaches (p) Use of a colon to write 12- and 24- hour times Length Noon is treated as 12:00 and midnight as 00:00 Mass Use either the or symbol but not both symbols at the same time, for ‘£’ ‘p’ example, £4.56p Volume Notation £ and p 12-hour and24-hour notation use a for example 18:40 and 9:30 a.m. ‘:’, Reasoning opportunities and probing questions Suggested activities Possible misconceptions Compare quantities by estimation NRICH: Some pupils do not write 24-hour times as four digits, for example Ask students to tell the time of using images of the Greenwich 1:50 rather than 01:50 for 1.50 a.m. NRICH: Observatory Clock or 24 Hour watches. How does a 24-hour watch Some pupils may write pound and eight pence’ as ‘one ‘£1.8’ need to operate differently to a 12-hour watch? Some pupils may use both and symbols, for example ‘£’ ‘p’ ‘£4.56p’ NRICH: Convince me that 18:40 is the same as 6:40 pm. Some pupils may write pounds and fifty six pence’ as or ‘four ‘4.56p’ Convince me that pounds and five pence’ is not written as ‘two ‘£456’ NRICH: ‘£2.5p’ NCETM: : Activity A NCETM: Learning review NCETM:
Use analogue and digital 12-hour clocks Know the number of seconds in a minute, minutes in an hour, hours in a day, and the number of days in each week, month, year and leap year Know the value of all British coins and notes Know the number of pence in a pound Calculate the duration of time for a given event or task Analogue Digital 12-hour 24-hour Second, Minute, Hour Day, Week, Month, Year Pound (£) (p) Length Mass Volume Notation £ and p 12-hour and24-hour notation use a ‘:’, for example 18:40 and 9:30 a.m. Some Jewish clocks rotate anti-clockwise. There is a 24-hour analogue clock at Greenwich observatory. 24 clock notation using four digits. Any time before 10:00 a.m. uses a zero as the second hour digit, for example 9:15 a.m. is written as ‘09:15’. Noon is 12:00 and midnight is 00:00 NCETM: Common approaches Use of a colon to write 12- and 24- hour times Noon is treated as 12:00 and midnight as 00:00 Use either the ‘£’ or ‘p’ symbol but not both symbols at the same time, for example, £4.56p Reasoning opportunities and probing questions Suggested activities Possible misconceptions Compare quantities by estimation Ask students to tell the time of using images of the Greenwich Observatory Clock or 24 Hour watches. How does a 24-hour watch need to operate differently to a 12-hour watch? Convince me that 18:40 is the same as 6:40 pm. Convince me that ‘two pounds and five pence’ is not written as ‘£2.5p’ NCETM: NRICH: NRICH: NRICH: NRICH: NCETM: : Activity A Learning review NCETM: Some pupils do not write 24-hour times as four digits, for example 1:50 rather than 01:50 for 1.50 a.m. Some pupils may write ‘one pound and eight pence’ as ‘£1.8’ Some pupils may use both ‘£’ and ‘p’ symbols, for example ‘£4.56p’ Some pupils may write ‘four pounds and fifty six pence’ as ‘4.56p’ or ‘£456’
Scheme-of-Learning-Maths-KS41.docx