One way to find out if we are properly nourished is to calculate that what nutrition scientist called body mass index BMI is equal to calculate let each student in the class find out his or her weight and height take the weight of a student in kg then take the height by drawing up a scale on the wall and measuring accuracy with the head straight convert the highest recorded in centimetre into metre divide the weight in kg by the square of the height .the number that is BMI Then you get the BMI look at the tablets given on pages 90-91 A student BMI could be within the normal range or less than that underweight a more obesity for example if a girl student is 14 years 8 months old and the BMI is 15.2 then she is undernourished or more . similarly BMI of a boy is 15 years and 6 months is 28 and he is overweight. discuss the life situations food and exercise habits of students in general without body shaming anyone......Class 10 economics chapter 1​