Everyone knows what good teaching is. Really? Those in Germany who have pneumonia typically receive a highly effective medication that has been tested for its efficacy in many experimental studies. Administering an ineffective preparation is considered malpractice. What is common practice in medicine faces resistance in education. Many elementary school teachers still confidently use the Rich Method "Reading through Writing" in their reading and writing instruction, even though this method is detrimental to less capable students. Without solid empirical evidence, open methods such as free and project work, workshop instruction, weekly plans, and station work are practiced in Germany as progressive methods. These progressive methods are intended to best accommodate the heterogeneity of students. Students are to benefit from these methods.