What comprehensible input actually means, and how to use it without a textbook

The idea behind reading slightly above your level, how settled the research actually is and how to get input daily without a course.

Quick Answer: Comprehensible input is language just above your current level: you follow the meaning, and a small share of it is new. Reading and listening at that setting is what moves ability forward, because your brain picks up structures from context. You don't need a textbook to get it, only material graded to where you are.