Courses of Dalian Maple Leaf Middle school integrate with all English Canadian courses of senior high school's "double language, double degree".

枫叶初中课程与“双语双学历”的枫叶高中全英文加方课程对接。

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It found students at elementary and middle-school levels do feel a high degree of happiness, but things get worse as they grow older.

研究发现，小学生和中学生确实会有程度较高的快乐感，但是随着他们长大，则每况愈下。

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By the time students get to middle and high school, they're more likely to be taught by a teacher with a degree in science.

CNN: Subject Matters: Science has an image problem