OneNumber teaches these Tableau classes:
Desktop I: Fundamentals
Learn core Desktop skills in this introductory class. You’ll gain a thorough introduction to data analysis and visual design in Tableau, and learn how to build views and interactive dashboards.
Desktop II: Intermediate
Expand your knowledge and distinguish yourself as a Tableau power user. Structured for those who have a solid foundation with Tableau, this course will help you take it to the next level.
Desktop III: Advanced
Explore Tableau Desktop’s more technical features and dig deeper into your data. You’ll learn advanced uses for calculations and chart techniques that create innovative analysis and dashboards.
Create more meaningful visualizations by learning the science of data visualization and visual best practices. You’ll become a better analyst, designer, and communicator after taking this course.
Read more at https://www.tableau.com/learn/classroom