Unlock Second edition, a paired skills academic-light English course gets your students to think critically. The Teacher's Manual and Development Pack conveniently provides answer keys, additional activities, teacher support and professional development in one single book. Your teaching is supported with flexible lesson plans and additional activities for the purposes of both extension and differentiation. Learning Objectives are provided for every lesson to ensure you and your students are clear on what you are achieving. Common Students Errors are highlighted to help you support your students. Teacher development material, developing critical thinking skills in your students, is available in every unit. Peer-to-peer teacher training material is downloadable from eSource.