Below is a link to BBC Bitesize. It is full of lessons that include Writing, Reading and SPaG. Please complete at least one of the activities a day, ensuring you challenge yourself and select areas you need to practise.
Here are some suggestions:
Subordinate clauses
Expanded noun phrases
Understanding subordinating and coordinating conjunctions
Paragraphs
Fronted adverbials
https://www.bbc.co.uk/bitesize/collections/year-3-and-p4-english-lessons/1