Ok, great! My favorite writing resources for students who can do written narrations well:
Jump In, by Apologia (variety of writing styles, very fun for reluctant writers, probably junior high or remedial high school)
Teaching the Essay and Teaching the Research Paper by Analytical Grammar for the student ready to jump in and write essays.
There are lots of people who like IEW. I myself find it too formulaic to meet our needs so I’ve never used the history writing. One thing to note is that it is important to be able to write a wide variety of essays, and not just in one subject. My teens write essays in English, history, politics/economics/current events, science, etc.
One problem I’ve never had is teens with no opinions.
I must have ordered the specially-opinionated variety. We’ve been having extremely spirited debates with great frequency since they were 11 or so. LOL Of course Dad is an attorney and Mom a political scientist so maybe it’s hardwired in. I do recommend a variety of thinking skills–Charlotte thought not too highly of logic as a discipline, but in our current day I’m afraid it’s critically important because we’ve LOST what we used to know. We do logic/thinking skills as a subject from about 11 on.
Also this all assumes that your student has had enough grammar to be fluent in writing. I do also recommend picking up a style book to use in working through and correcting papers.