KidzSearch is a great resource partnered with Google that will help you find good websites on your topic. These sites have been approved by teachers and librarians across the country for their research value.
When you want to know whether or not a resource will be useful to you, remember to think like A-CRAB. Consider the following qualities:
Librarians recommend: CommonLit, a free collection of fiction and nonfiction for 5th-12th grade classrooms. A librarian from Tennessee, Ms. Fink, says, "Major publications such as NPR and Science News donate articles to CommonLit. The text are paired with additional texts, media to build background knowledge, and can be annotated."