💡 Teacher's Tip: This is your most important skill. You need to pull data yourself. Focus on Joins, Group By, and Window Functions (Rank, Lead/Lag).
💡 Teacher's Tip: Data is useless if you can't present it. Learn one BI tool deep—Tableau or PowerBI. Learn to build interactive dashboards, not just static charts.
💡 Teacher's Tip: When Excel crashes with big data, Python saves the day. Learn Pandas for cleaning messy data and Matplotlib/Seaborn for custom charts.