PrepositionBuilder™ is designed to help elementary aged children learn the correct use of prepositions and learn how prepositions can change the meaning of a sentence. During play, the student is presented an image and must drag a preposition to complete a sentence about the image. If the student chooses the wrong answer, the image and sentence change to show the student the proper use of the preposition they chose and how it changes the image. Once a student completes a module, they unlock a short animation that is part of a larger story. They must complete all the modules to see the entire story.