To change teaching method and improve teaching quality is the core of PE.

改变教学方法、提高教学质量是体育教学的核心。

youdao

After many years of PE teaching in colleges, as we re-examine the various elements of the physical education, we are trying to find a core element of the reform of PE teaching in colleges.

经过多年高校体育教学，我们在重新审度构成体育课诸要素的同时，努力寻找高校体育教学改革的核心要素。

youdao

The PE practical courses' appearance is action (physical exercise), the core of it is psychology experience. learn through practice is better than the only experience.

体育实践课程的外观形式是活动（身体练习），内在核心是心理体验。

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Mr Draper says PE should be a core part of the new curriculum.

BBC: The challenge of providing good PE lessons