学习策略、记忆系统和产品思维，助你养成更好的学习习惯。
Spaced repetition is the most evidence-backed technique for long-term retention. Here is how it works, why it matters, and how to use it without burning out.
The CEFR framework defines six proficiency levels from A1 to C2. This guide explains what each level means in practice, not just on paper.
Using the same exercise format repeatedly leads to pattern matching, not learning. Varied practice builds transferable skills across listening, reading, writing, and speaking.
Spanish is one of the most accessible languages for English speakers. This guide covers what to learn first, common pitfalls, and realistic timelines.
A practical system for balancing review, exposure, and speaking without burning out.