DOS donosi nastavni materijal nastao u sklopu nastave povijesti za učenike šestih razreda te je korišten za potrebe Erasmus+ projekta  Green Energy Saves the Earth. Materijal je za potrebe projekta pisan engleskim jezikom. Following the example of painted breviaries 6th grade students made a presentation of medieval chores through the twelve months of the year. They complemented the images with a short description. Outcomes - the student will be able to: -       analyze historical sources -       explain what a breviary is -       describe the economy of the Middle Ages with an emphasis on the area of their homeland - the use of renewable energy sources of water from the Middle Ages to the present.