A challenge for L2 teachers is how to develop both accuracy and fluency in oral communication since one often seems to be achieved at the expense of the other. This question is the main tension against which the author wrote this book. The book presents an analogical reasoning method of how best to bring about balance of accuracy and fluency with minimum efforts. It is a new input/feedback strategy based on the ACTFL Proficiency Guidelines. To help learners gain oral proficiency in their target language, input/feedback must be sequenced by the level of complexity which immediately follows their actual developmental levels. In other words, input/feedback has to follow a set of suggested but not directly expressed criteria. This book made these criteria explicit, and converted them into ready for use input/feedback insights so that learners can achieve their potential.