One thing that came easily to me in school was writing. I didn't really have to try because it's something that I naturally gravitated toward, unlike math and science. I do know, however, that many students struggle with it and I was reading a homeschooling page tonight that happened to contain some tips for teaching students how to write, that I feel would be useful in both the homeschool and ESL classroom.
Take a look, it might help. http://pearsonhomeschool.com/index.cfm?locator=PS1r8e&elementType=news&elementId=244163&utm_content=bufferca99f&utm_medium=social&utm_source=plus.google.com&utm_campaign=buffer