I have been designing resources for many years as I worked with preschool and primary age youngsters with delayed or impaired speech and language skills. The resources using symbols are free. My latest resources which I have illustrated are extra tasks based on Marion Blank's Language Levels (previous ones have been free). They can be used with groups of mixed language ability and are reasonably priced.
Two resources with pictures and captions. Firstly to introduce some vocabulary and information, and secondly to check that the captions can be read and matched correctly. Illustrations from Widgit and ClipArt.