CINAHL Plus is a database that indexes nursing and allied health literature. We can use searching limiters to narrow down to articles relevant to health education.
Limit your publication date if you like to find only newer articles
Because this is also a nursing database, if you are getting back too many irrelevant nursing articles, you can limit down your results to certain Journal Subsets. I recommend choosing Health Promotion/Education and Public Health (you can choose both using the CTRL key)
Locating FullText
There are a few other databases that may have relevant sources for Health Education topics. Try similar keyword searches to those you use in CINAHL.