Reference resources are a great way to get started with your research. They can help you gather fast facts about a topic, focus your argument, and find lists of further readings written by experts in the field. Use the indexes and tables of contents to understand what you will find in each and go from there.
There are numerous encyclopedias that provide an overview and background information on every education topic imaginable. These entries are citeable and can provide useful perspectives on how topics might be organized and/or keywords/phrases to use in more in-depth searching.