What are the difficulties that English teachers usually face with students?

Their spelling and lack of motivation.

I think it is the student's lack of interest regarding the topic being tackled, lack of concentration and or the student experiences something just like bullying for example.
But sometimes its not the student who is questioned.
Some teahers who's teaching is ineffective which makes the topic seems boring and unrelateable to the students.
In order to establish cooperation, a teacher should be effective to his/her students so that students will have that feeling of starting to love a specific subject.
:)

Gramatical concepts taught and explained (and understood) are almost never implemented by the students in their creative writing.
This is true till the end of an academic year, very often.

in my viewpoint I think that the most difficulties that teachers may face with students is boredom especially when they are not intersted in the material,this is the main.THe other secondary ones when the learners don t respect their teacher and when there is no harmony in the class.Also when there is no good clasroom management which concise the above reasons.hopefully that I helped you

It is almost impossible to teach formal English to students who have had no exposure to proper English, either in in spoken or written form. Everything taught in a classroom is undone by the way English is spoken at home and the way it is written by friends and peers. If students are not exposed to proper English while learning to speak, read and write they are unlikely to ever adopt proper grammar as a habit. While there are certainly appropriate times and places for slang and colloquial English, if this is the only type you are regularly exposed to, you see no reason or purpose or use to formal English. 

Science shows that very young (preschool age) children have an easier time learning language than as we grow older. The centers of the brain used in language learning are more active and receptive in small children. If children are not exposed to proper English during this time, learning it later is much more...

Lack of motivation or interest, bad command of English

Pupils will not interacting with the teacher, they get bored from replying in english 

love to learn english as alanguage not as acirculum or aschadule

Lack of motivation seems to be the main problem so as a teacher you need to keep your students interested.

Lack of teaching aids and teaching material for students and or teacher.It is unfair to students who often pay a lot of money for their lessons, to have to work from photocopies.

The students' knowledge and comprehension of English should be more or less on the same level.Its unfair to have to spend more time to explain repeatedly when70% of the class are  already familiar with the topic being taught.

the main difficulties which the tecaher may face

1-when the students didn t accept him or can contact with them  in good manner.

2- when they cann t grassp what he is presenting which means that his pedaguogy is not effective.

3-when he cann t understand so good the psychology of the student so this makes very big problem 

Lack of respect HOW CAN TEY ARE LOVE THE LANGUAGEHE