This document discusses teaching big data technologies and provides insights into facts and fallacies. It outlines big data technologies and scopes, including data management systems, data warehousing, machine learning, and infrastructure. It discusses goals of teaching big data for students, job markets, and nations. It provides facts about growing computer science enrollments and online learning platforms, and notes the French job market seeks skilled and senior profiles. The document recommends curriculum focus on theory, programming languages, and distributed systems before specialized big data technologies. It also discusses implementing high-performance computing in France and potential in Tunisia.