text: Education should be a school's top priority, and part of having educated students is having students that are as knowledgeable as they can possibly be. Each kid has different subjects or activities that they excel at. Some may do well at math while having trouble in English, and others may be good at soccer but not so good in History class. If you change school policy and make it so that students can't participate in sports or other activities unless they have at least a B average, you are preventing students from being their best at what they do or in other words, being knowledgeable in their activity.