Junior high school mathematics fragment teaching refers to the targeted teaching activities for a specific mathematics knowledge point or skill in the teaching process.

1, function image and properties:

Through the observation and analysis of function images, students can understand the monotonicity and parity of functions and learn how to use these properties to solve problems.

2. Geometric transformation:

By explaining geometric transformations such as translation, rotation and turnover, students can understand the transformation law of graphics and use this knowledge to solve practical problems.

3. Solve a linear equation:

Teach the solution and skills of linear equations in one variable, such as addition and subtraction, multiplication and division, formula method, etc. And let students consolidate their knowledge through practice.

4. Proportional line segments and similar triangles:

By explaining the properties of proportional line segment and similar triangles, students can understand similar triangles's judgment method and use this knowledge to solve practical problems.

5, probability statistics:

Teach the basic concepts of probability statistics such as probability of events, random sampling, data collection and analysis, and let students understand the application of probability statistics through practical cases.

6. Calculation and simplification of algebraic expressions;

By explaining the addition, subtraction, multiplication, division, multiplication and square root of algebraic expressions, students can master the calculation and simplification methods of algebraic expressions skillfully.

7. Proof of geometric figures:

Teach the proof methods of geometric figures such as isometric, isometric and similar triangles, so that students can consolidate their knowledge through practice.

8, the solution of equations and inequalities:

Explain the solutions of equations and inequalities, such as addition, subtraction, multiplication and division, factorization, etc. And let students improve their problem-solving ability through practice.

9, data processing and statistics:

Teach the methods of data processing and statistics such as data collection, collation and analysis, and let students master the application of data processing and statistics through practical cases.

10, functions and equations:

By explaining the relationship between function and equation, students can understand the essence of function and learn how to solve equation problems through function.