None of these are "computer science fundamentals", they're software engineering fundamentals. Computer science != engineering and programming. Engineering is a

None of these are "computer science fundamentals", they're software engineering fundamentals. Computer science != engineering and programming. Engineering is a craft you learn under the tutelage of peers and masters, i.e. at work or perhaps in a community (e.g. open source). That is what you should expect to provide to your interns. They're not cheaper, fully-formed labor.