Kahoot is a platform that allows you to create multiple choice quizzes in which students can participate. It also provides the statistics of each participant(accuracy, weakness, time...). The game requires a quick response to questions. Right+quick=Winner

Quizlet is also a platform, but it allows you to create content in the form of cards. Your students study the cards, then try to match each side of the card with its other side.

Both applications improve motivation and competetiveness. One rely on rapid feedback while the other rely on memory.

On the other hand, Voki's concept is totally different. It is an application through wich the teacher desigh a virtual character, record a speech(lecture, instruction,assignment...) and let the avatar take the role of the teacher in the classroom. Students can also make use of Voki to submit verbal assigments in a more entertaining way.

2-These kind of platforms can be projected in the classroon with the purpose of teaching and assessing student in an unusual, appealing, and entertaining way.

3- Gamification add motivation, competetiveness, creativity, and ability to understand easily the intended message.