It is important for our own professional development that we constantly strive to improve our teaching, and adapt it according to our successes and setbacks. For this, we need the input of our students (it's the Student Voice concept, for which Moodle is perfectly suited). We could use Moodle's Choice activity module as a very basic survey. But the issue with this is that the pupils are able to respond to only single word, or short phrase suggestions that we give them. If we want a more detailed evaluation of our efforts in Moodle, the optional Questionnaire module fits the bill perfectly, as we can include choice-type option button answers and also give them free rein to comment in the text boxes. And don't think that just because the students haven't reached double figures, they aren't capable of giving insightful opinions!
There seems little point in going step-by-step through the operation of a Questionnaire if your Moodle doesn't have...