In keeping with the commodification of the teacher-learner relationship, I’m providing students in my classes with this guarantee.
I can guarantee that what we are studying in this course, both subject and method, is applicable outside the classroom in your daily and your professional life. This course is designed so that what you learn during the course you can use in other situations and other courses, both at the university and elsewhere, now and later in life. However, there is no guarantee that you will actually make use of what you learn in this class outside of it, any more than buying a toothbrush guarantees you will use it to keep your teeth and gums healthy. That use now and later is solely up to you. Don’t squander what you learn.
Maybe the last sentence is too much, but I’m hoping it will stick with students. Free to share and adapt.