Diagramming

As an older timer, diagramming is a new approach to grammatical structure. When I went to school, the nuns had has write out sentence and identify every single part of speech and its specific function within each sentence. Since Zoo is a master builder, I thought the construction approach might appeal to him.
English Grammar Revolution

The workbook needs to be used with companion materials to review parts of speech prior to each lesson. The workbook deals only with the position of a part of speech and does not define directly nor provide examples. It gives practice on positioning a part of speech within a sentence and on identifying which words are grouped together. The subject and predicate are clearly dilineated. The hierarchical diagram illustrates clearly the relative importance of words revealing the guts of the sentence.
Better Sentence Structure through diagramming