This is a resource I use with my students on the autism spectrum to help them to correct sentences as well as form new ones. The reduction in number of tasks (four or five per page) and the visuals are compatible to their learning style.
This product contains a page where students must rewrite sentences by including a capital at the beginning and a period at the end. No other aspect of the sentence structure is addressed yet, because these students tend to learn things one step at a time.
The second and third pages are descriptive pictures. Students must compose sentence about these pictures.