One of the best resources, undoubtedly are flash cards with pictures. You teachers can use them in so many different ways including games, lesson activities and speaking practice, or for displays.
I've designed a set of my own, so happy downloading!
The above flash cards are the beginning of sentences that can be used for the speaking exam practice if the student is talking about what they do as hobbies, what they do in their free time and what sports they practice and subjects they study. As for the following download - I have designed a number of flashcards (words only) which are examples of what people do as hobbies or activities in their free time.