Having worked informally with international students for the past 12 + years, I have discovered a few resources that are helpful. The following is a list of resources I most often turn to.
1. English Grammar Helps
This site is written by Seonaid (pronounced “shona”) She is a linguist from England. She has lots of grammar exercises that are easy to use. The student I am currently working with loves them.
2. Discussion Question Resource
This site has lists of topics for conversations. Click on a topic and you will find a page of questions that are useful in leading discussions.
3. Voice of America
This is VOA website has a truly many things to offer a person learning English. I have directed you you my favorite page which offers idioms and slang used in a short paragraph. The sentences explain the idioms, which is very helpful.
International Conversation Cafe 