We discuss over one hundred interactive learning tools that we created and piloted in introductory open-education (OER) microeconomics classes. These interactive tools cover a wide range of microeconomics topics. They are highly randomized so that the presented scenario and correct answers are different on each usage of a tool, which not only provides students with unlimited practice attempts, but also significantly reduces the possibility of cheating by sharing answers. These tools can be uploaded into most learning management systems, and scores are automatically recorded. Student feedback is positive. The tools are available to others at no monetary cost at http://econreimagined.gsu.edu .