This is one of their most popular series, providing materials for the Primary Years Programme (PYP) , Middle Years Programme (MYP) , and Diploma Programme (DP) . For the DP, they offer dedicated textbooks for both Analysis & Approaches (AA) and Applications & Interpretation (AI) at standard and higher levels.

The series covers a range of topics, including:

The language used is designed to be clear and concise, making it accessible for English Language Learners (ELL) in international school settings.