There, Paul has actually found no change in student achievement for high-schoolers regardless of instruction time.

在那里，保罗实际上发现，无论教学时间长短，高中生的学生成绩都没有变化。

He says it can work for kids as long as schools maintain a baseline amount of instruction time.

他说，只要学校维持基本的教学时间，这对孩子们就有效。

When districts drop that fifth day of school, they will usually tack on extra instruction time to the end of the four remaining school days to meet state requirements.

当学区取消第五天的上课时，他们通常会在剩余的四个上课日结束时增加额外的教学时间，以满足州政府的要求。

Those ones that have maintained high levels of instruction time close to what they were under a five-day school week - we see no difference in achievement among four- and five-day-school-week students.

那些保持高水平教学时间接近五天学校周的学生 - 我们发现四天学校和五天学校周的学生的成绩没有差异。