You probably already searched a database this week. Don't think so? What about Amazon, YouTube, iTunes? These are electronic collections of content that you can browse and search through to find what you want. If you keep that in mind, searching a database for journal articles shouldn't seem too different.
Research topic: What factors influence retention of high school teachers?
Keywords: "retention" "job satisfaction" "turnover" "burnout" "work life balance"; "high school" "secondary education"; "teachers" "instructors"