The perfect sequence for middle grade! Pearson Longman Keystone Level A, just as Cornerstone, empowers students to discover new words, use their background knowledge, connect it to new information and take part in creative activities. Keystone Level A makes the perfect link between Cornerstone and Keystone! Through a variety of activities, Keystone reviews and expands all reading strategies in Cornerstone; it continues to improve English skills in grammar, word study, and spelling. Fun projects help students demonstrate listening, speaking and writing skills learned through both Cornerstone and Keystone. Keystone includes a mix of many subjects, such as Science, Math and Social Studies; enabling students to understand the vocabulary and organization of different types of texts and acquire the tools needed to approach school content.