The textbook used is the Thirukkural.
The Thirukkural is a text that has core secular ethics. When studying it, you must ask the question as to what principle contributes to your ethical mindset and how are those values cultivated.
The Thirukkural is the theoretical framework for the cultivation of ethics and principles.
The Thirukkural is a book used as a source to guide your behavior and your beliefs.
The benefits of values from the Thirukkural are explored and you are taught to set goals towards those values that contribute to the ability to care skilfully for yourself and others.