If a student seems to be having difficulties with their English language studies, you may have to investigate the cause in order to provide a solution. Check whether your students had difficulties acquiring any of the language skills in their L1 and if they still have difficulties.
How many ways can you represent the sound /sh/ in written form. When students seem to be struggling or progressing slowly, perhaps check the depth or transparency of the target language.
One reason why ESL and EFL students may be having difficulty learning a foreign or second language is that they rely heavily on their native language (L1) writing system and the English orthography differs greatly to their L1.
There are always a number of students in foreign language classes that can't seem to keep up with the pace of the other students. The following four theories may help teachers pinpoint the root of their ESL / EFL students' difficulties.