Training aids and Workbook

Workbook and training aids are semantically related in textbook topic. In some cases you can use "Workbook" instead a noun "Training aids", when it comes to topics like text.

Workbook noun - A student's book or booklet containing problems with spaces for solving them.

Training aids and workbook are semantically related in textbook topic. You can use "Training aids" instead a noun "Workbook", if it concerns topics such as text.