# Measuring Standard Units of Length

## Students` Learning Outcomes

• Measure and write standard units of length including abbreviations.

### Information for Teachers

• In grade level 3 we only concentrate to measure the small objects, but teachers can extend objective to develop the interest of students.

• While teaching the lesson, also consult textbook where and when applicable.

### Material / Resources

Writing board, chalk/marker, duster, ruler, meter rod, measuring tape, paper strips; paper pin, toothbrush, candle, paintbrush, key, nail, match stick

### Introduction

• Show a small scale to the students.

• Ask them to hold their scale in hand.

• Observe that some lines are longer and thicker that others; on the scale.
• These lines indicate centimeters.
• Reading on small scale start from 0cm to 15cm.

### Development

Activity 1

• Ask the students to measure the length of their pencil.
• Place the ruler in such a way that one of its straight edges touches both the ends of pencil (tip of lead to top).

• Make sure that the left lead is at zero.
• Count the measurement up to where top of pencil is placed on scale.
• Write down the length of pencil on your notebook; like as Length of my pencil = 10cm.

Activity 2

• Distribute the paper strips to students (all strips have a straight line segment of different length).

• Ask the students to measure the length of a line segment by using ruler.
• Ask them to write the measurement on strip and return it.
• Check their work and appreciate them.
• If they make a mistake, guide them properly.

Activity 3

• Place the things; candle, paper pin, toothbrush, paintbrush, key, nail, matchstick, and ruler on the table.

• Ask one of the students to pick anything from table and measure the length of it by using ruler.

• Write the name and measurement of object on the board. like as Length of candle is = 10cm
• Call one by one all students to perform this activity.

Activity 4

• Make a pair of each student.
• Fix the measuring tape on the wall by scotch tape.

• Call one of the pair and ask them to measure the height of each other.
• Ask one of the students to take off his shoes and stand straight against the wall.

• Put a book on top of his head. Make sure it is level. Mark off where it touches the measuring tape.
• Count the measurement and write their heights on board.
• Perform this activity by all pairs of students.

### Sum up / Conclusion

• Sum up the concept by repeating the rules of measurement of length;

• Place the ruler in such a way that one of its straight edges touches both the ends of object.
• One of the ends of object should be placed on 0cm of scale.
• Count the measurement up to 2nd end of object is placed on scale.

### Assessment

• Assess the students by inquiring about the lengths of different objects and units used for measuring their lengths.