Verbal explanations are often more confusing than helpful and can increase anxiety by giving too much information. Almost all of what is dealt with in these efforts at explaining will be learned during the walk-through with far less effort. In fact, by offering instruction in the dance line you will be teaching beginners to look to you for guidance rather than the caller. Your most useful role is to help your partner relax and build their self-confidence. Even when asked specifically for an explanation it is almost always better to assure your partner that all will soon become clear and direct their attention to the caller's voice.
Experienced dancers can help by correcting errors made by beginners.
Negative comments, critiques, or even careful suggestions almost never help. Help beginners with a gentle and encouraging lead in the right direction. When talking seems absolutely necessary, express yourself only in positive terms. When a group of dancers is completely lost experienced dancers nearby should shout instructions to them. Instructions from uninvolved dancers will draw the beginner's attention in the wrong direction and are likely to increase their anxiety.