five letters

Think of a five-letter word, for example ‘heart’, and for each but one letter write a dot on the board, revealing only one of its letters, eg.: .e...

Students call out a five-letter word, eg. ‘fears’. Circle the letters that appear in your word too, and put a square around the letters that not only appear in your word but are at the right place (e, a and r in my example). The goal is to find out the teacher's word in maximum five tries (hence the name; there are going to be five lines and five columns).