The links below lead to subscription databases. They all have their own search engine, which searches the content. Unlike the open internet, most of the content is paid for and was selected by a professional as a good resource for students.
Proquest provides a K-12 database.
Britannica is an online encyclopedia and general subject database that will provide articles,images,and videos for almost anything you are researching.
SIRS is a Proquest K-12 specific general reference database containing 1000s of full text articles exploring social, scientific, health, historic, business, economic, political and global issues. You can save your searches on this database and come back later.
United Streaming is a repository of videos. See the password locker or information center staff for the password.