100m and 50m Dash

Learning Outcomes

1.To provide the students a rigorous physical activity for 10 to 15 minutes.

2.To enable the students learn measure the distances using measuring tape.

3.To eanble students learn to use stop watch and record the timings of participants of 100m dash.

4.To enable the students compare two quantities of the same units by dividing one quantity by another quantity.

5.To eanble the students  identify the terms of a ratio and notice that it is important to write the terms of the ratio in the correct order.

 

Description Of Activity

1.Divide the children into 5 groups each consisting of 6 to 8 students.

2.Conduct a 50m Running Race competition for each group and record the time taken by each student

   to cover 50m.

3. Now, conduct 100m Running Race for each of the groups and record the time taken by each student

    to cover 100m.

4.Now assemble all the children after the race and ask the students to compare the two races.

5.Children will reply that they ran 50m more in the 1^st  race  than in the 2^nd race.

6.Ask the children to express the distance ran in 1^st race in terms  of the 2^nd race.

7.Children will immediately answer that the distance ran in the 1^st race is ½ of the distance ran in the

  2^nd race.

8.Ask the children how did they arrive at it.

9.Children will respond that by dividing the distance ran in the first race by the distance ran in the 2^nd

   Race.                                                                                         

11. Distance ran in 1^st race/ Distance ran in 2^nd race = 50m/100m =1/2.

12. This way of expressing one quantity in terms of another quantity is called as ratio. We say that

      The ratio of distance ran in the 1^st race to distance ran in 2^nd race is 1 is to 2.

13.We denote the ratio using symbol ‘:’

14.Distance ran in 1^st race :Distance ran in 2^nd race = 50m:100m =1:2

15.Ask the students to express the distance ran in 2nd  race interms of the distance ran in 1st race.

16.Chidren express it as 

     Distance ran in 2nd race : Distance ran in 1st race = 100m:50m = 2 : 1.

17.Teacher should emphacize that it is very important to write the terms of the ratio in correct order.

Variations

1.Children who may not be able to run may be asked to walk.

2.We can conduct 100m dash and 200m dash instead of 50m dash and 100m dash.Here I planned for 50m and 100m dash inorder to save time.

3.The same activity can be used to teach the concept of proportion by comparing the raios of distances children ran in 1st race and 2nd race and ratios of times they have taken to complete the races.

Coaching Tips

1.The activity may take longer duration to complete, hence the teacher should arrange all the equipment needed and make the track ready well in advance.

Equipment/Material Required

1.Measuring tape to make race track.

2.Lime powder to mark the lanes.

3. Stop watches to record the timings.