The Berenstain Bears' Report Card Trouble

It's report card day at Bear County School-a day Brother Bear has been dreading. He's received horrible marks in all of his classes, except gym. If only his grades were based on how many strike-outs he's pitched or soccer balls he's stopped and not on fractions and vocabulary.
There's not a doubt in his mind that Papa will explode when he sees Brother's report card. The only question is: will he lower the boom on Brother's extracurricular activities too?