Academiacentinela — language-learning | academiacentinela.org
Input works when it sits just above your level; the craft is keeping it there, week after week, without boredom or burnout.
Comprehensible input is language you can mostly understand while it still contains something new. Below your level it teaches nothing because there is nothing to learn; far above your level it teaches nothing because there is nothing to hold on to. Almost every input failure is a level failure wearing the costume of a motivation failure.
Video is the usual tool, and the subtitle choice decides what it trains. Native-language subtitles help vocabulary but let the eye do the listening work; target-language subtitles force real processing, because sound must be matched to spelling in real time; no subtitles is the skill itself. The usual progression is L1 first, then L2, then none — and the common mistake is living on the first rung for years.
A transcript plays a different role from subtitles. Reading a scene's transcript after watching it turns guessing into checking: you find out whether the word you heard was the word that was said. Subtitles during, transcript after — the order matters, because the ear must attempt the work before the eye is allowed to confirm it.
On narrow screens, swipe or scroll the plate sideways.
Graded readers solve the level problem for text. A book at roughly 95% known words can be read unassisted; at about 98% it supports comfortable reading with a dictionary. The same novel behaves like two different books depending on the support you allow, which is why 'I tried reading and gave up' usually means the level was wrong, not the habit.
Shadowing is the active half of input. Speaking along with the audio in real time, at full voice, trains the speaking-to-listening link that passive study never builds — and 10–20 minutes a day is normally enough. Use material you already understand; shadowing uncomprehended audio is parroting, shadowing comprehended audio is welding.
Choosing material is a counting exercise, not a taste exercise. Open a page, count unknown words per hundred running words: about five means 95% coverage and gist reading, about two means 98% and pleasure. If a text is broadly understood but not enjoyable, that is the coverage gap doing its arithmetic — drop a level and the same author becomes readable.
Further reading