The most obvious way that misinformation does damage is by causing people to believe misconceptions or reducing belief in accurate facts. One experiment found that just a handful of cherry-picked statistics about climate change confused people and reduced their acceptance that climate change was happening. After being shown the misinformation, they also become less supportive of action to reduce climate change. Other, more subtle impacts of misinformation are also dangerous, such as eroding trust in scientific institutions and scientists. While studying how misinformation does damage, scientists have also researched and developed approaches to help build the public's resilience against misinformation. Teachers are in a powerful position to implement these evidence-based strategies--not only playing a pivotal role in building students' resilience but also providing deeper, more engaging science education that equips students with sorely needed critical-thinking skills. Much of this article is devoted to sharing those strategies so that teachers and students can effectively counter misinformation.