I think Time4Writing is a great way to get help teaching writing to your kids. As you know, they can get sensitive about feedback on their writing from their parents.
Time4Writing Provides One-On-One Writing Help for Kids
Time4Writing provides eight-week online writing courses that help elementary, middle and high school students build writing skills through one-on-one interaction with a certified teacher. Students study a new topic each week through automated online exercises, lessons, readings, and written assignments. A personal writing teacher reviews and provides feedback on each assignment, the day after it is submitted.
They have Elementary School Online Writing Instruction which covers the Types of Sentences. They have High School Writing courses. They teach how Graphic Organizers Help Students Master Writing and How Writing Rubrics Improve Writing. Their Middle & Secondary School Writing courses start with teaching how to Write Paragraphs using the The Writing Process. They explain how to interpret Writing Prompts and how to Write a Better Book Report.
