Please find attached a vocab review game which will take no longer than 15mins; the vocab are key words from Unit 4 and 5.
I have 3 rows of students (double desks, five lines back, three rows across) and I get a student from each row to stand up (start from the front and work back). The fastest student to recognise the picture and say the word out loud gets a ticket.
They write their name on the ticket and I pull out three at the end of the class (I give a small prize, but whatever works for you).
There are 30 slides so that should give you a possible 3 'rounds'.
Hope it works well for you:-) I'm always surprised at how the 'lowest' students seem to be the ones to recognise the pictures the quickest- a nice surprise:-)