A few of my Connecticut homeschool mom friends use the Royal Fireworks Press curriculum by Michael Clay Thompson with their kids. After hearing these videos I can say I agree with his philosophies.
About removing grammar from American public schools and it resulted in kids not being able to write, and "now the College Board is going crazy". The generation of journal writers is struggling in college.
All the good writing curriculum companies agree on the foundational principals when you listen to what they are saying.
You can find more videos of Michael Clay Thompson on YouTube.