I had this memory about these old books I used to read in elementary school, but I can’t think of the title. It’s a book series about these teenagers who all have dragon blood or DNA or something. Each book follows a different teen, but I’m pretty sure it was all connected in some way.
It might be the Dragonblood series, written by Michael Dahl.
The dragons are returning, and across the world young humans are discovering that they were born with dragon blood, which gives them powers. Each book in the series narrates the adventure of a different teen, which matches your description.