Also available: Jewels of the Trade and Activity Pack
These books are ideal for teachers to carry in their bags. Jewels of the Trade is subtitled "Aid for Students and Teachers" and contains exercises for just about any technical problem you could imagine. There's no new material really but everything is in one book and it is very well presented. Games Teachers Play is full of fun teaching ideas to aid the teaching of those aforementioned technical problems! These 2 books can be used at any level. The Activity Pack contains stickers, badges etc to aid motivation.