This tag is appropriate for all questions relating to the JavaFX graphical library. Questions on educational usage of the library are appropriate as are questions on the relative merits of JavaFX to other Java libraries, such as Swing in the teaching environment.
JavaFX is a new (Java 8) library for graphical applications that is more clearly based on the Model View Controller architecture than is Swing. Use this tag for questions relating to the merits and usage of JavaFX.
Technical questions about JavaFX are probably better directed to other StackExchange sites.