You can improve your math instruction skills by using a variety of teaching methods and resources, regular assessment and feedback, building positive relationships with students, and continuously updating your knowledge and skills.
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Improving your math instruction skills can be a challenging but rewarding process. As a teacher, it is important to continuously improve and update your knowledge and skills in order to provide the best possible education for your students. Here are some tips to improve your math instruction skills:

Use a variety of teaching methods and resources
One of the easiest and most effective ways to improve your math instruction skills is to use a variety of teaching methods and resources. This will help keep your students engaged and motivated, and will help them to better understand the material. Some methods you may want to try include visual aids, games, group work, online resources, and handson activities. 
Regular assessment and feedback
Regular assessment and feedback are essential for improving your math instruction skills. Assessing student progress allows you to identify areas where your students may be struggling and adjust your teaching accordingly. Providing regular feedback to your students will help them to understand their strengths and weaknesses and take ownership of their learning. 
Build positive relationships with students
Building positive relationships with your students is crucial for effective math instruction. When students feel comfortable with their teacher, they are more likely to ask questions, participate in class, and take risks. Showing an interest in your students’ lives and taking the time to get to know them as individuals can go a long way in building positive relationships. 
Continuously update your knowledge and skills
Mathematics is a constantly evolving field, so it is important to continuously update your knowledge and skills. Take advantage of professional development opportunities, attend workshops and conferences, and stay uptodate on current research and trends in math education. As Albert Einstein once said, “Intellectual growth should commence at birth and cease only at death.”
Interesting facts on the topic:
 Studies have shown that using a variety of teaching methods and resources can improve student outcomes in mathematics.
 Building positive relationships with students can lead to higher student engagement and academic achievement.
 Providing regular feedback to students has been linked to increased student motivation and achievement.
 The National Council of Teachers of Mathematics (NCTM) provides a wealth of resources and professional development opportunities for math teachers.
 According to the U.S. Bureau of Labor Statistics, employment of math teachers is projected to grow 5% from 2019 to 2029.
Table:
Tips to Improve Math Instruction Skills 

1. Use a variety of teaching methods and resources 
2. Regular assessment and feedback 
3. Build positive relationships with students 
4. Continuously update your knowledge and skills 
Watch related video
Vikas Gupta shares his advice on improving mathematical skills, which includes taking time to build ideas before solving problems, avoiding overconfidence, and looking for alternative solutions. He stresses the importance of concept clarity and understanding rather than simply memorizing methods. Gupta also advocates for effective online learning and advises taking notes and revising them to truly understand and apply skills. Developing these skills can boost accuracy, confidence, and the ability to solve more challenging problems.
Check out the other answers I found
How to improve math skills
 Wrap your head around the concepts.
 Try gamebased learning.
 Bring math into daily life.
 Implement daily practice.
 Sketch word problems.
 Set realistic goals.
 Engage with a math tutor.
 Focus on one concept at a time.
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 Establish mathematics goals to focus learning.
 Implement tasks that promote reasoning and problem solving.
 Use and connect mathematical representations.
 Facilitate meaningful mathematical discourse.
 Build procedural fluency from conceptual understanding.
 Support productive struggle in learning mathematics.
 Call on students who may not have the correct answer.
 Give students informative feedback.
 Praise students for perseverance in problem solving, not for being smart.
 Display work that shows creative problem solving, not the highest scores.