Positives: Versatile with media and plug-ins; created for use in education; built on the Wordpress platform (which is a good thing because Wordpress is one of the most commonly used blog sites); it's free.

Drawbacks: The Wordpress platform can be a little overwhelming to use at first.

Positives: Connects to school Google accounts; user friendly; quick set-up; works with all media.

Drawbacks: Fewer customization options compared to Wix and Wordpress/Edublogs blogs; not exclusively for educational purposes.