Acme Dance Company delivers a 30-week dance program to inner city students at their school once a week, culminating in a stage dance performance by students to a large audience at the end of the school year. Acme would like to measure the effectiveness of its program in impacting students' attitude towards school. A market research firm suggests doing a pre-survey with students before the program begins, and then doing a post-survey after the program is completed to measure the changes in student attitudes towards school. 

Do you agree or disagree with this approach of measuring program effectiveness? Why or why not?