The topic based teaching design of "same course, heterogeneous" emphasizes that teachers should design diversified content for the same course based on personal reality, understanding, and style. Whether it is the "different teacher heterogeneity" among different teachers or the "same teacher heterogeneity" within the same teacher, it is necessary to follow the regular method of topic based teaching design to optimize teaching design.

1、 To seize the basic opportunity, that is, to innovate

Emphasis was placed on the importance of "same course, heterogeneous" in topic based instructional design, which seeks innovation and differentiation in instructional design. Innovation is reflected in design ideas, strategies, teaching materials, situational materials, classroom activities, and student activities. For example, Teaching Design 1 of "The Essence of Freedom and Equality" adopts the strategy of "big concept real problem live task", which stimulates students' interest and thinking through activities such as interviews, discussions, debate competitions, and role assumptions. Design 2 adopts the process of "situational introduction teaching new courses connecting with life expanding and sublimating", using teaching methods such as topics, lectures, situational teaching, and exploration cooperation. Both designs utilize innovative contextual materials and cases, as well as activities such as comic appreciation, video watching, case analysis, and group discussions, to enhance student engagement and learning outcomes. In addition, the two designs also demonstrate innovation in board design, such as the Tianping board and the Kite board, which are both clever and closely related to the teaching content.

2、 To grasp the basic elements, namely accuracy

Emphasis was placed on the importance of basic elements in topic based instructional design, including topics, contexts, and activities. The topic is the core of instructional design, and different teachers will design different topics based on the same theme. The setting of scenarios aims to promote students' participation and experience, such as guiding students to understand society through simulated activities. Activities are an indispensable part of instructional design, stimulating students' exploration and cooperation through various forms such as on-site interviews, debate competitions, etc. These elements together form the framework of topic based instructional design, ensuring the effectiveness and diversity of teaching.

3、 To grasp the basic aspects, namely dimensions

Emphasis should be placed on the basic elements of topic based teaching design, such as analysis of teaching content, analysis of learning situations, determination of teaching objectives, selection of teaching and learning methods, determination of teaching key and difficult points, design of teaching processes, blackboard design, teaching preparation, teaching evaluation and reflection. Through the teaching design case of "The Essence of Freedom and Equality", the existence of similar links in different designs is demonstrated, and it is pointed out that although these links have diverse forms, their core is consistent, which is the key to the success of topic based teaching design. Teachers should consider both "similarities" and "differences" when designing, while maintaining core consistency and showcasing teaching characteristics.