To develop appreciation for mathematics among children, a teacher performs the following activities in the class. Choose the one which is not effective to achieve her objective.
1
She always praises the student who achieves highest marks in the class in the term-end examination.
2
She shows to children the videos on mathematicians and their Indian contributions.
3
She gives mathematical puzzles and magic squares to be solved in the class.
4
She establishes a mathematics corner in her class where students can perform various mathematical activities.