In order to be easier to study in high school, children need to have a fruitful knowledge of the basics of science. That is why the All-Ukrainian School Online Project will be useful for 3rd-grade pupils. During the lessons on science, little pupils will learn the aggregate states in which water can be found, what properties are typical for various fluids, as well as discover many more interesting facts about our world. It should be noted that all videos are presented with sign language interpretation, so children with total or partial hearing loss will also be able to join in the lessons.