Lesson Plan of Subtract Units of Time
Subject Mathematics
Grade III
Students` Learning Outcomes
 Subtract units of time in hours.
 Solve real life problems involving subtraction of units of time in hours.
Information for Teachers
 Units of time are used to measure the duration between the occurrences of two events.
 The smallest unit of time is second.
 The other units of time are minute, hour, day, week, month, and year.
Time unit hour can be subtracted from hours.
 While teaching the lesson, also consult textbook where and when applicable.
Material / Resources
Writing board, chalk/marker, duster, pointer/stick, textbook
Introduction
 Ask students:

 How many hours are in one day?
 If you spend 6 hours each day in school then how many hours do you spend on other activities?

 Explain the subtraction procedure on the board.
Development
Activity 1
 Write the following statements on the board and then ask questions.
 Maroon and his wife reached Islam Abad from Lahore in 8 hours by train and taxi. They travelled two hours by taxi. How long did they travel by train?
 Zara finished her homework in three hours. She completed Math`s work in one hour. How much time could she spare for rest of the homework?
Activity 2
 Ask students to find the difference between the following pairs of time:
Sum up / Conclusion
 Among hours, minutes and seconds, hour is the biggest unit of time. Hours can be subtracted from hours through simple mathematical subtraction process.
Assessment
 Akram slept only 4 hours yesterday night. How much time he remained busy during the whole day?
Follow up
 Nadia covered a distance in 3 hours. Ahmad covers the same distance in 2 hours. How much more time Nadia took to cover the same distance than Ahmad?
 Ask the students to solve the questions given in the textbook.