When you point, wave, shake or nod your head, you can also assist students in understanding the lesson. Without saying a word, you can get them to answer “Yes” to a question or assure them that they’re right; and by shaking your head to indicate that an answer is “No” or that they are wrong.
For example, you ask the student “What is the weather like today? It is hot isn’t it?” However, the weather is not hot, and you also indicated to the student that he or she should answer with a full sentence, using the vocabulary learned. You shake your head, and you expect the student to deliver, “No, it isn’t. It’s cold.”
Here is another example. "With which body part do I smile?” After a few seconds, if the student does not understand, you point to your mouth and smile. Then, you ask the student to smile; you write the word on the board, and the student remembers the word smile, how to say it, what it means and how to write it.