Best emojis for major🎓🔑🗝️🌔🌖

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🎓
graduation cap
graduation hat, mortar board with tassel, commencement, scholar, degree, major, school, college, university, graduation ceremony, graduate, learn, education, course, academic, expert, master
🔑
key
key points, solution, major, crucial, important, critical, unlock, access, conclusion, summary, TLDR, keyword, license, password, ownership, main, opportunity
🗝️
old key
key points, solution, major, crucial, important, critical, unlock, access
🌔
waxing gibbous moon
moon phase 4/8, majority
🌖
waning gibbous moon
moon phase 6/8, majority