ConnectED

Log in to ClassLink, click NCEdCloud.

From the Applications page on NCEdCloud, look for "9-12 ConnectED Resources".

You're logged in! Feel free to use any of these databases for your research project.  The short descriptions under each tool will tell you what they specialize in.  For the best, broadly-focused database, scroll down.

EBSCOhost is an excellent, general-use, academic database.  It will work for 90-95% of the research projects you are likely to be assigned in high school.

Bonus advice: If you're looking for subject area-specific help. Those green buttons for Arts, CTE, Science, ELA, etc will take you to a subpage that can offer you much more targeted advice for the class you are in.