An encyclopedia is a book or digital collection of factual summaries (short articles) on many subjects listed in alphabetical order. Below are links to online encyclopedias for elementary schools.
A database is an organized, collection of information. Databases come in many forms and uses. The ones below contain factual articles useful for elementary student research.
eBooks, or electronic books, are books made available in digital form and viewable on electronic devices.
A primary source is a first-hand account or original source of information.