Interland is a playful online adventure game that is designed for kids to learn digital citizenship standards. Kids can engage in four game levels including "deny hackers, sink phishers, one-up cyberbullies and outsmart oversharers".

https://kahoot.com/
Kahoot is a game based quiz site that teachers can create in class quiz or out class practice quickly. Discussion board can also posted on Kahoot. Students are able to submit their answer of the quiz like a game and the score depends on how fast they get it right. Students can either work alone or create a competition environments. All they need is put in the code the teacher share on Kahoot.it and start game.