The "i+1" concept, developed by linguist Stephen Krashen, refers to the idea that language learners acquire new language skills most effectively when they are exposed to input that is just slightly beyond their current level of understanding. The "i" represents the learner's current proficiency, while the "+1" signifies the next level of complexity. This approach encourages learners to engage with material that challenges them without being overwhelming. In practice, "i+1" suggests that teachers and learners should seek out resources, such as books, conversations, or media, that introduce new vocabulary and structures while still being comprehensible. This method promotes gradual learning and helps build confidence as learners progress in their language acquisition journey.