Many schools started online courses for students to study. at home on account of the spread of COVID-19.    1    , the outcome turned out to be not satisfying, because the online education required teachers to carry out live stream courses using mobile phone software and properly interact with students, which proved    2    challenge for many teachers.

Some teachers discovered they left the microphones off before finishing the online courses, and others were frequently interrupted by    3    (they) young children's shouting or crying. Sometimes they had to repeatedly reconnect to the platform due    4    poor Internet connection,    5    annoyed both the students and the teachers. Some schools offered online courses for each subject including sports. Teachers found it awkward    6    (give) instructions online because many children did not have enough space to move. Some parents complained that they had to join several different chat groups of different    7    (subject) . They also hated to accompany their children taking online courses just to make sure their children were    8    (full) concentrated instead of    9    (play) video games.

Schools should not put any unnecessary academic burden on primary and secondary students through online classes, the Ministry of Education said on Wednesday. It was recommended that online courses    10    (link) to infection prevention and psychological health guidance.

For the past few years, online classes     1     (give) students an alternative (替代选择) for studying without going outside. How can we most     2     (effect) use this online resource for learning? Here are some tips from     3     (vary) online learning platforms to make the most of     4     (you) classes.

First, you need to be clear about     5     you’re most interested in, then find reliable sources. “The quality of online courses varies,” Li Mengdi, a head teacher with Xueersi said. “Choose extra classes after fully     6     (consider)your time and energy,” Li suggested. “I’ve seen many students or their parents choose more than three   courses to take   on     7     same day. It is overwhelming (难以应付的).”

Most online platforms can provide a personalized guide     8     students. “It is Finishing a to-do list that     9     (help) students to form good habits,” said Yang Zhengda, the CEO of vipJr. With enough self-discipline (自律), everything     10     you need to learn online should fall into place.