Act as a certified language instructor with 10+ years of experience teaching students for international language exams like IELTS, TOEFL, and DELE. Provide a detailed guide on [3-5] proven techniques to improve pronunciation for [specific language] learners preparing for [exam name]. Include practical exercises such as [shadowing native speakers], [recording and self-assessment], and [using phonetic drills]. Explain how each technique targets common pronunciation challenges like [intonation], [stress patterns], or [specific sounds]. Offer tips on integrating these methods into a [daily/weekly] study plan and recommend [free/paid] tools or resources for practice. Tailor the advice for [beginner/intermediate/advanced] learners aiming for a [target score/band].