Active Grammar is a new three-level grammar course aimed at teenagers and young adults.
I co-authored level 3, and contributed a lot of supplementary materials (tests, review units) to level 1.
Level 1 is aimed at elementary to pre-intermediate level learners (A1 - A2). Level 2 is for intermediate and upper intermediate level learners (B1 - B2). Level 3 is for advanced and proficient learners (C1 - C2).
Each book is available in two versions: with or without a key.
Each unit starts with an engaging text, designed both to present the target language in context and to generate interest in the topic itself. There is then a step-by-step presentation of the target grammar point, followed by a series of exercises, progressing from very controlled to completely open-ended.
Watch an interview with Penny Ur, the Series Editor of Active Grammar.