Flippity easily turns any Google spreadsheet into flash cards, a badge creator, a spelling quiz, a memory game, a word search, and more. Teachers can use Flippity for a variety of purposes: to present to the class, to assess individual students, or to have students make their own creations. In each case, check out the demo, and then use the templates and detailed instructions provided to transform your spreadsheet. (Description from Common Sense Education) Free Version
Getting Started
You don't even need to sign up for an account to use Flippity.net! As long as you can access Google Sheets, you will be able to use their templates.
Under each game type, you'll see a "demo" and an "instructions" button. The instructions will go over everything you need to use their template. To use most templates, you will click the button to make your own copy which will open in Google Sheets.
Make sure you only edit the columns indicated. If you edit a cell that contains a formula, it may cause an error for the game.