Site news and math teaching

I have updated my menu (issue LEARNING -MATH )  with thoughts about 
probability in

I take the opportunity to tell that  I saw a beautiful lesson about Babylonia math in Youtube. I recommend it for my  math teacher colleagues and frends. I had to write this comment in Youtube about it where I tell about my own math teaching:

“Great lesson Tibee. You are a *very talented* teacher. I followed math history when teaching from grade 4 to 7 teaching. Kids math skills develope well following how the human kind developed its math skills. A. So we started the first years (grade 4 )working hard with fractions learning among others about the egyptian use of fractions. B. When my pupils were skilled enough with fractions and had a good knowledge of fraction values (grade 5-6, knowing also about 1/10, 1/100 etc) we were ready to start with the decimal system , So it was time to tell about the Egyptian and Roman number system and how the 0 came from Brahmaguptas India with Al Khwarizmi to Bagdad, how “arabic math” many years later was imported to Europe with abacus with Fibonacci. In grade 5-6 we started gradually with algoritms (from easy (addition) to more advanced (subtraktion, multiplication and division). 9/10 of My pupils were imigrants from and some born in arabic speeking countries. They, where very proud of “their” story of math and got more motivated to learn “arabic math”. Not only. We avoided the typical problems many kids have with our decimal system du to lack of fraction “maturity”. I have “Histoire universelles de chiffres” written by Georges Ifrah. You seem to have read this book too. I have never had time to deepen the Babylonian 60 system described in the book. It is a pity you didnt had this video here on Youtube 20 years ago. 😉 Greetings from a retired math teacher whose passion for almost 30 years was math and math teaching.”