RATS E-courses by Estima
Estima have an ongoing series of e-courses covering popular topics in detail.
These courses go into much more detail than the main RATS documentation. Each course costs US$50. Courses can be purchased on the Estima website and are e-mailed.
Each course consists of a PDF workbook, RATS programs and data which focusses in detail on one topic. The PDF workbooks are 150 to 300 pages and cover 15-30 useful examples in detail, explaining the RATS instructions used to accomplish the task. When applicable, the relevant theory surrounding a calculation is also provided.