Custom Widget Content per page

I’m building a website for a training establishment, and I am making pages for each course they offer, but I want to display custom content in the sidebar for each course, like location, length, course info etc (example at http://visioncollege.ac.nz/courses/information-communication-technology/diploma-in-web-development-and-design/ in the “Courses at a glance” section). Can anyone suggest how I can do this? I’ve tried so many widgets but none of them do what I’m wanting 🙁