What is the best way for teachers to help students read and speak fluently?

I think this can be done through different ways, but a teacher should focus on letting or enabling his students to do more practice - specially reading and speaking -  because the ideal way to gain a language is through practice, practice and practice.

Only by paying more attention to them by spending more time and effort trying to help them master the task 

We cannot provide one single answer to this valuable question, but I believe the teacher can diversify his/her questions and the activity to meet the needs and learning styles of all the learners

"SIMPLIFY" and show them how SIMPLE it is to apply. 

More sugar more sweet, so spending more time and making more effort with weak students can improve them a lot because practice makes perfect.

first  i give hem any advice  to  read s a righ 

You have to give them special attention.

Here are some suggestions:

- Tell them success stories about those who learned the language.

- Let them start reading a topic they like and that topic must have a wide range of academic vocabulary.

- Giving them pronunciation lessons (-ed, intonation etc.)