Using games as a teaching tool in classes is proved to be effective in learning process as learners give their full attention to them eagerly. Games can be used for cognitive and psychological developments of learners. For example, they gain the ability to focus on details and more than one thing at a time, and they approach to the lessons in a much more positive way.
A popular game called Minecraft has released a version for education purposes only, enabling students to get engaged, invested in building and to expand on their virtual worlds. Link to the web site: https://education.minecraft.net/
Some other games that can be used for education purposes in classes: My Word Coach, uDraw Studio: Instant Artist, Sesame Street:Once Upon a Monster, Smarty Pants, Reader Rabbit, Escape Adventure Island, Portal 2 and so on.