As a primary school math teacher, learning English can be beneficial for communicating with students, parents, and colleagues. Here's how you might approach it:

1. **Start with Basic Vocabulary**: Focus on essential math-related vocabulary such as numbers, operations (addition, subtraction, multiplication, division), fractions, geometry terms, etc.

3. **Immerse Yourself**: Engage in English conversations with students, parents, or colleagues to practice speaking and listening skills.

4. **Join a Language Exchange Program**: Find a native English speaker who wants to learn your native language, and practice with them regularly.

6. **Take Classes or Workshops**: Attend English classes or workshops specifically for teachers to enhance your language skills further.

Remember, consistency and practice are key to improving your English proficiency as a math teacher.