Tension is a necessary factor in achievement. If something is too easy then people don’t try as hard and if something is too difficult then people give up. That’s why being a teacher involves challenging students with content and concepts that are only slightly beyond their grasp.
In classroom observations, the biggest single problem I see, time and again, with novice and experienced alike, is too much TTT. It’s a big topic, not least because prescriptions on teacher talk tend to get overlooked and are sometimes dismissed.
This method is for rank beginners and I believe it to be the most efficient way of attaining a beginner level from scratch. It’s inspired by the theory of Conceptual Semantics and the worthy aspects of Grammar Translation.