The given graph shows the pass percentage of students taught by six teachers of a school in the Senior Secondary Board exam.

Identify the teacher whose students have shown the  maximum improvement.

Dr. Kalra

Lets solve one by one for each option .

1. Mrs. Taneja

Pass percentage of students in 2017 = 98 

Pass percentage of students in 2018 = 100 

Improvement in performance = 100 - 98 = 2

2. Mr. Saxena

Pass percentage of students in 2017 = 78

Pass percentage of students in 2018 = 87

Improvement in performance = 87 - 78 = 9

2 . Dr. Kalra

Pass percentage of students in 2017 = 85

Pass percentage of students in 2018 = 97

Improvement in performance = 97 - 85 = 12

3. Mr. Joshi

Pass percentage of students in 2017 = 85

Pass percentage of students in 2018 = 92

Improvement in performance = 92 - 85 = 7

So ,  Maximum improvement is shown by  students of Dr. Kalra.