It treated reading as an exercise in "message-receiving" and "problem-solving" — the goal is to get the jist of the text (a story, some instructions, etc) — and the problem is figuring out new or unfamiliar words encountered while reading.
Students learned techniques like "What words do I know that start this this letter?" and “What do the pictures in the story show?" and “What words would make sense given the parts of the sentence I understand?" and so on. It seemed to work well!