This book includes evaluation criteria - by chapter and repetitive - corresponding to the teachable, examinable material of the Principles of Economic Theory of the G class of General Lyceums (GL) and Vocational Lyceums (EPAL). Each evaluation criterion contains four groups of topics, corresponding to those of the nationwide exams. The second part of the book provides complete answers and solutions to all questions and exercises, so that the student can check his/her knowledge and evaluate his/her performance. This book can be a useful tool for students preparing for their entry into tertiary education, as well as for fellow educators supporting students in their efforts.