To develop mathematical interest in children, a teacher conducts the following activities in her class. Choose among these the one which is not effective in fulfilling its purpose.
1
He has created a mathematical corner in his classroom where students can do various mathematical activities.
2
She always praises the student who scores the highest marks in the term-end examination in the class.
3
She shows the children videos of Indian mathematicians and their contributions.
4
She gives the class mathematical puzzles and magic squares to solve.