7W case-lessons are the main innovation in the world in 2018-2019. A lot of teachers, parents and students use them at school, or as homeschooling, or online. They give more knowledge in less time. They focus attention on the right knowledge. Case "Snowflakes and fractals"Scans: Geography/Astronomy/Mathematics/Art/Relaxation/EmotionWhat do you know about a snowflake? Is it a small piece of snow that falls from the sky or a small "ice beauty" that nature has created? And, do you know about the s