> "delay the teaching of geometry to grade 9" This part shocks me a little bit. All kids in Vietnam start geometry at grade 6. I have a hard time comprehend wh

> "delay the teaching of geometry to grade 9" This part shocks me a little bit. All kids in Vietnam start geometry at grade 6. I have a hard time comprehend what is the difference that makes kids in a developing countries can learn things 3 years ahead of a developed countries.