1. What information do teachers need to know about their learners to prepare good lessons?
I agree with Jennifer. It´s important to know their age just to give them examples that they can understand better but I think gender is not something important because under my point of view doesn´t affect to learn.
2. Why is it important for teachers to know about their learners’ characteristics and needs?
Characteristics and needs are two points to take into account to create a right method to teach based in learners lacks.
3. How can teachers find out about their learners?
Well, I think that it could be useful to start the first lesson introducing ourselves. That is to say, learners and teacher should have a talk just to create a comfortable atmosphere and like that getting great information about them.