教学是一种系统的工程艺术，是一种以合作为基础的双边活动。
Teaching is a systematic engineering art, a bilateral activity based on cooperation.
数学教学是一项双边活动，充分挖掘数学教师能力，发挥数学教师课堂的主导作用，是提高数学课堂教学质量的重要方面。
Mathematics teaching is a bilateral activity, fully excavating mathematics teachers competence and exerting their leading role in class are an important point in advancing teaching quality.
教学是教和学的双边活动过程。
Instruction is a bilateral activity of teaching and learning.
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