How I Use It
I used StudyBlue for a while as a 4th grade teacher. I would make "decks" and share them with kids (through a web link). The iPad and Android apps do much of the same. I used it for vocabulary review in all subjects. There are 3 ways to use the app/site: flip cards, take a quiz, or review sheet. These are basically used to review already created decks of flash cards. Great for center based practice at lower grades, and individual practice at upper grades.
StudyBlue is pretty basic. It does not offer the different games that some other flash card apps/sites offer. It is ok and does its job. Like I said above, I used this for a while in 4th grade with my students, but later moved to another program for the options it offered. StudyBlue is basic, clean, and easy to use (upper grades). I feel that lower grades will struggle with the interface some but it is a useful tool for vocabulary practice.