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A 1997 study found slowing audio down improved L2 listening comprehension, and a 2024 study of 168 learners found speed interacts with proficiency level.

A National Reading Panel review found repeated reading raises fluency, and a 2025 study found narrow reading raised L2 vocabulary scores with a large effect.

A 186-learner EFL study found text-audio produced the largest listening gains and text-picture the largest reading gains, but all three combined added nothing.

A 332-learner study found high schoolers scored 91% higher with bilingual subtitles than with none, but subtitles did not help young beginners at all.

A landmark study found new habits take 66 days to feel automatic on average. Here is what that means for building a daily English learning routine that lasts.

Comics pair pictures with text, and research on that combination found EFL learners scored 45% higher after multimodal study than after text-only study.

Shadowing means speaking along with audio in real time. A 2025 study found it raised EFL listening scores 32% in 8 weeks and linked it to pronunciation gains.

Comprehensible input means text you can almost fully understand. A landmark 2000 study found 98% word coverage is the threshold, and how to test your own level.

Duolingo builds a daily habit, Storybook teaches through stories, ELSA Speak fixes pronunciation, HelloTalk finds native speakers, and Anki locks in vocabulary.

Spaced repetition beats cramming for English vocabulary. A 2022 meta-analysis of 48 experiments found a medium-to-large effect on retention over massed study.

A 26-week EFL study found reading while listening to audiobooks lifted English listening scores and produced 4x the vocabulary gain of a control group.

Learning English through stories works through extensive reading: meeting words again in real context. How to pick the right level, plus 5 apps to try.