Everyone knows grammar charts are dull. But you can liven them up with the old game of telephone. To introduce a new grammatical structure, whisper a sample sentence in a student’s ear. Have the student repeat what s/he heard to the next student, and then s/he repeats what s/he heard to the next student, and so on. The last student writes what s/he heard on the board, and then you write the correct sentence below it. Have fun comparing the telephone version to the correct one, and then introduce the key grammatical structures.