Some think it necessary to do so. Firstly, it's more effective to study with a teacher's help than by themselves. Secondly, you can have more chances to communicate with teachers there are more interaction between students and teachers.) . Besides, you can make up for what you miss or fail to understand in classes on weekdays.

Others think it unnecessary. For one thing, students can easily form the habit of dependence. For another, students need time for rest and recreation at weekend. What's worse, attending training classes or hiring tutors even causes some students not to listen attentively in their regular classes.

In my opinion, whether a training class or tutor is needed just depends. If you are really very weak at or interested in a certain subject, maybe it's OK for you. But be sure to choose a good and suitable class or teacher, otherwise it would be a waste of time and money.

题目分析：这是一篇话题类作文。目前,越来越多的中学生利用周末上各种各样的培训班或请家教.对此,存在不同观点:1.认为有必要有老师辅导比自己学好，可以弥补上课错过或没听懂的东西… 2.有人认为没有必要, 容易养成依赖习惯，学生需要时间休息和娱乐…3.你的看法。要用一般现在时来写。需要写的内容已经给出，但是写作时不要仅仅对要点进行生硬的翻译，而是要添加些内容，使文章看起来更充实，要组成一篇通顺连贯的短文。需要注意紧扣文章主题，给出的要点都需要包括，缺一不可，尤其注意一定要写出自己的看法。写作时注意准确运用时态，上下文意思连贯，符合逻辑关系，不能出现文章脱节问题。尽量使用自己熟悉的单词句式，同时也要注意使用高级词汇和高级句型使文章显得更有档次。注意要求的字数120左右，不要太多也不要太少。

【亮点说明】Besides, you can make up for what you miss or fail to understand in classes on weekdays.这个句子中含有一个宾语从句；What's worse这个短语的使用，意思是更糟糕的是；In my opinion, whether a training class or tutor is needed just depends.这个句子中含有一个主语从句。