Disclaimer: I'm not a teacher.
"Worth" is an odd duck. As used in phrases of the type "X is [not] worth Y", most dictionaries classify it as an adjective. In any case, here are some examples of how it is used:
Romeo and Juliet is a play worth reading. (Also: Romeo and Juliet is worth reading.)
If you like tragedy, it's worth reading Romeo and Juliet.
John's advice is worth taking; he knows what he's talking about.
Speaker 1: Do you think his plan will work?
Speaker 2: It's worth a try.
For what it's worth, I think you did a good job.
Is it worth it to buy a new computer? Our old computer is slow, but it still works.
Also: Is buying a new computer worth it? Is it worth buying a new computer?
Getting an education is worth the hassle of doing homework.