Partnership Writing! Our newest writing program is now available for a reduced price, limited time offer: $29.95 If you're looking for writing projects for your 9-10 year olds, check us out: http://www.bravewriter.com/program/home-study-courses/partnership-writing/
From Growing with Grammar. Levels 1-8. Looks like an easy-to-implement, step-by-step writing program that includes plenty of instruction, but doesn't overwhelm with the process. I looked through levels 1-3 and they look great! They also offer spelling & vocabulary and grammar.
Writing With Ease has made a big difference in the writing skills of both of my kids since I began homeschooling them. It has also improved their listening skills, graphomotor skills, and given us some ideas for our reading list!