Джерела

- URL: https://learningapps.org/
- URL: https://www.thinglink.com/
- URL:https://www.jigsawplanet.com/
- URL:https://uk.wikipedia.org/wiki/%D0%97%D0%B0%D0%BA%D0%BE%D0%BD%D0%B8_%D0%9D%D1%8C%D1%8E%D1%82%D0%BE%D0%BD%D0%B0
- URL:http://gutpfusik.blogspot.com/2012/01/blog-post_27.html