I really agree with your thought. If students are not shown how the concepts taught within the four walls of the classroom are linked to the outside world, students cannot make the connection and they cannot get motivated to learn the subject. Again vice versa for a outside classroom activity if students are not shown or do not understand how they can use the classroom knowledge to solve a problem, then the knowledge they gain might not be useful. So facilitating both inside and outside class activity becomes an important consideration in a pedagogical context.