What core principles that college should teach?

"Other People's Knowledge" in IEEE Spectrum mentioned that most of the knowledge an engineer applies is learned through on-the-job problem-solving and just-in-time knowledge acquisition. Colleges only need to provide the fundamentals and the core principles of engineering. I tend to agree with this viewpoint since on-the-job problem-solving gives you immense driving force to tackle the problem and is extremely effective to imprint the knowledge you just learned in your brain for a long time. The question is "What kind of core principles of engineering that college should provide if most of the knowledge is not learned in college?"