This book is definitely grade level. I have gone thru this book as a review with my son, we have worked thru it in a few weeks. I have been able to use the lessons for copy work and focus on writing skills and grammar. I will go thru the next few books till we are on grade level and his writing has improved.
I cannot speak highly enough of this book. It's written to be taught in ways that kids actually learn. It teaches english, technically, and age appropriately, along with memorization, and content skills seamlessly. For the life of me, I cannot understand why this isn't' used in schools. This is not a comprehensive language program, it teaches English grammar. If you have no reading comprehension program, you'll need more than this.