The textbook and accompanying workbook are incredibly easy to understand and both are written with an excellent progression of concepts. I never learned most of this information, and never diagrammed a sentence in my life, but these books have made it fun and easy to understand! I enjoy working in them so much I'm considering teaching just so I can help others love grammar too. As a side note, I also really appreciate the sociological commentary on use of standard English as a potential method of shaming and oppression. The author is sure to give appreciation for dialects and everyday slang as fodder for the change, growth, and sustainability of English.