1. Basic data preparation: including filtering, data types, and transformation (Use the Data Interpreter, Pivoting, Data Types, and Data Source Filters).
2. Trend data visualization: especially year-over-year changes, differences, and percent differences (Use a Line chart and Table Calculations).
3. Percent of total analysis techniques: specifically looking at Income Group and Region over the last two years in the data set (Use Bar Charts and Table Calculations). They are particularly keen to understand directionality of the calculations, i.e. Table(Across), Table(Down), Pane(Across), etc.
4. Geographic visualization: especially how to show numeric measures on a geographic view (Use a Map with circles representing each country to show Population).
5. Custom chart capabilities: design a tutorial on how to build a Waterfall chart visualizing year-over-year global GDP growth.