Comprehension is truly the culminating event of being able to read. It is less a skill to be taught, but more of a by-product of being able to read accurately (phonics), fluently, and having a strong vocabulary.
Building background knowledge from Reading Rockets
Read-Aloud Practices to Support Comprehension from The Meadows Center
Rethinking How to Promote Reading Comprehension- Hugh Catts
Details on comprehension from Reading Rockets
Video: The Knowledge Gap- Natalie Wexler