It is so important to have a plan for the class, set clear objectives and goals. I learned the difference between goals and objectives. We need to set clear objectives to get the goal. I talk with my students about what I expect from them. For example, in my case, teaching Spanish, I say them that it is important to learn how to make short questions, answers, how to make negative and affirmative statements. With this in mind, they can have a clear idea on which are the objectives for the class, what should they learn.