There is an urgent need for improved teacher training worldwide in order to better equip educators and their students with the essential critical thinking skills. This is critical to survive in an interconnected world where viral disinformation and misinformation spreads at an ever-increasing pace. By focusing on teacher competence development, we may facilitate a situation where students are immunized against gullibility, logical fallacies and cognitive biases, and armed with not only significant and necessary fact-checking skills, but also bestowed with a skeptic, yet not cynic, frame of mind. With an evidence-based mindset our students will hopefully be ready to better deal with the very real and urgent dilemmas humanity is currently facing.