Program or books to learn English Comprehension & Grammar

[Ahmawa]

I am struggling to find a programme or a structured set of books that I can get to help my DS with English grammar, spelling and comprehension. He is in reception and his reading is fine I believe according to his teachers.

I have a bit of an adhoc approach to helping him by just finding random worksheets online to learn about a topic. I would much prefer to go through a structured program.