Create specific situations, connect with things around you, help students know and understand symbols, help students understand symbols, expressions and relational meanings in actual problem situations as much as possible, and develop students' symbolic consciousness of solving practical problems. In the teaching of symbolic calculus, students should try to avoid mechanical practice and memory, but should increase practical background, exploration process and geometric explanation to help students understand. If students can abstract the quantitative relations and changing rules from specific situations and express them with symbols, it shows that students have transcended specific practical problems, discovered the universality and universality existing in a certain problem, and raised their understanding and reasoning to a higher level.

For example, in real life, signs in shops, red "X" signs in hospitals, traffic signs on expressways … all kinds of symbols can be seen everywhere. In this symbolic world, students' life experiences make them feel the practical significance of the existence of symbols. For example, they can immediately think of McDonald's when they see the exquisite "M" in front of the store. It can be said that in daily life, students have initially gained a sense of symbols, and they feel the simplicity, rigor and scientificity of symbols in their lives. This kind of symbolic consciousness has a positive role in promoting the formation of mathematical symbolic sense.

For another example, when teaching "Looking for the Law", the courseware shows that the lanterns on the roadside are arranged according to the law of purple, green, purple and green. Question: Can you find a way to show the regularity of this row of lanterns? Because lanterns are difficult to draw directly, it is easy for students to make use of the existing symbolic experience and think independently. Students can draw or write all kinds of symbols, full of personality. These symbols are just the existing symbol consciousness at work. Students are pleasantly surprised to find that they are also a researcher, explorer and discoverer!