In the Association of Teachers of Mathematics (ATM) Easter conference, 2006, the authors presented a list of important aspects of mathematics lessons, recommended for students to have a positive attitude to mathematics and for teachers to acquire effective teaching. The following are discussed in detail: (1) Mathematics lessons without good teaching; (2) Mathematics lessons without fear; (3) Mathematics lessons without misconceptions; (4) Mathematics lessons without involvement; (5) Mathematics lessons without surprises; (6) Mathematics lessons without ATM.