
Public learning track
Elapsed Time, Schedules, and Calendar Cycles
4th Grade · Math · Open Global Math
5 lessons
Goal
Calculate elapsed time across hours, days, months, and calendar cycles, and solve real-world scheduling problems using the four operations.
Featured Diagrams
Calculating Elapsed Time Within a Single Day
5 lessons
0 of 5 done
- 1Calculating Elapsed Time Within a Single DayUp nextStart
- 2Calculating Elapsed Time Crossing Noon and MidnightPremiumNot started yet
- 3Solving Elapsed Time Problems with Calendar Cycles and Leap YearsNot started yet
- 4Time Interval Problems With Four OperationsNot started yet
- 5Interpreting and Building Travel Timetables and SchedulesNot started yet
Standards Covered
- OGM.5.MD.3Open Global Math Standards 2026™ · Math · Level 5 / Grade 4 (Age 9) · Grade 4Read, calculate, and convert time across 12-hour (a.m./p.m.) and 24-hour clocks, analogue and digital dials; solve elapsed time problems across seconds, minutes, hours, days, weeks, months, years, and calendar cycles.
- OGM.5.MD.2Open Global Math Standards 2026™ · Math · Level 5 / Grade 4 (Age 9) · Grade 4Use the four operations to solve real-world problems involving distances, intervals of time, liquid volumes, masses/weights of objects, scale instruments with partial and unmarked units, and money (involving fractions and decimals).
Curriculum Framework
4th Grade · Math · Open Global Math
1
8 lessons
Metric Units and Two-Step Conversions
Understand relative sizes of metric units of length, mass, and capacity and convert from larger to smaller units using conversion tables.
2
6 lessons
Customary Units and Multi-Unit Conversions
Understand relative sizes of US customary measurement units and convert from larger to smaller units using tables and multiplication.
3
5 lessons
Reading Scales and Measuring Instruments
Read and interpret measuring instruments with partial and unmarked units on linear, mass, and liquid volume scales.
4
6 lessons
Multi-Step Measurement and Money Problem Solving
Apply the four arithmetic operations to solve real-world problems involving distances, liquid volumes, masses, and money with fractions and decimals.
5
5 lessons
24-Hour Clocks and Time Conversions
Read and convert time across 12-hour and 24-hour formats on digital and analogue dials, and convert between units of time.
6
5 lessons
Elapsed Time, Schedules, and Calendar Cycles
Calculate elapsed time across hours, days, months, and calendar cycles, and solve real-world scheduling problems using the four operations.
7
6 lessons
Perimeter and Area Formulas for Rectangles and Squares
Apply algebraic formulas for the perimeter and area of rectangles and squares, and work fluently with metric area units.
8
6 lessons
Composite Figures and Perimeter-Area Relationships
Calculate area and perimeter of composite rectilinear figures and explore how changing dimensions affects perimeter and area.