Vocabulary bluff
It is not so important that the students learn the words as they are not commonly used, but to express themselves in a convincing way when they are explaining their definitions. It is based on the old TV game.
Preparation
A number of cards with the definitions of words on them.
Procedure
I divide the class up into pairs or groups of three. I write a word that nobody could be expected to know. One word I often choose is 'otiose', which means 'useless, or serving absolutely no purpose'.
I explain the word in three ways, giving the correct meaning and two false ones, for example 'very smelly' (another adjective) or 'a tool for making potato rings' (a noun). The students try to guess the right meaning.
After this example I give words to the groups on small pieces of paper, with definitions that are slightly simplified, not just dictionary definitions. The groups then think of two false meanings for their words. Finally each group asks the other groups to guess the correct definitions of their words. I draw a table on the board with the names of the groups at the top and down the side and keep score and record the genuine definitions.
I generally, love to start my class with a warm-up session and I love to keep tracking unknown vocabulary. My students love this session since they can begin class with scores. I sometimes divide them into groups and sometimes in pairs. I use cards with words with simple meanings. Sometimes I just add an image with the word so that they can guess the meaning. It works as brainstorming. They take time, think, share, and discuss. It prepares them for the day's lesson and increases their tolerance as well as teamwork attitude. Next, I call the pair or group to come up with their findings in front of the class.