Education reform is being deployed in Vietnam in the direction of developing learner’s competencies in which integrated teaching is viewed as a practical, effective way to achieve educational goals. However, Vietnamese teachers are not familiar with integrated teaching. Therefore, instructing teachers in how to design integrated lessons and how to implement integrated teaching is necessary and meaningful. This article presents some measures to help teachers design and teach integration in Mathematics.

1. Principles in designing integratedlessons
 2. Integrated lesson design process
 3. Illustrate an integrated lesson
 4. Conclusion
 References

• Pham Duc Quang(The Vietnam Institute of Educational Sciences)