Interactive drag and drop games

What's the best free tool to make games where you drag and drop elements into their proper location? 

See https://community.articulate.com/series/33/articles/create-a-drag-and-drop-interaction for a simple example... if I'm just starting, where do I begin? I really want to make an interactive outline with facts to insert into the right place for my junior English class. But I'm just starting today, and finding it hard to find the right place to begin.

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