六年级的同学们在学习中一直保持很好的学习进度。

The grade 6 class has been moving along at a good speed.

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同学们在学习第五单元时用了将近一个月左右的时间。

For unit 5 students spent nearly a month or more on that unit.

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我知道一些家长一直好奇为什么同学们在学习第五单元时花费很长时间。

I am aware that some parents have been wondering why students spent a lot of time on unit 5.

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