"Tools for teaching critical online reading" is a material package for teachers that includes videos about critical reading. The videos cover the following topics: 1) What is critical reading? 2) How well can adolescent readers evaluate the credibility of online texts? and 3) How critical online reading can be taught? The material package also includes learning materials that can be used to practice the evaluation of the credibility of online texts with adolescent readers. The learning materials are in the collection "Tools for teaching critical online reading" https://aoe.fi/#/kokoelma/338. The videos were produced by Hannu Aaltonen, Hehkumedia, featuring actress Iina Hautala.