An airplane can travel at a speed of 400kmph to 9000kmph.
Brazil has recently gone through changes in school grades. Currently, at the age of 6 children attend from the grade 1 to 4 what is called Ensino PrimÃ¡rio (Portuguese for Primary Teaching, or Primary School), and afterwards from grade 5 to 9 the Ensino Fundamental (Fundamental Teaching/School).
Primary Education in the United States. In the US the first stage of compulsory education is generally known as elementary education. It takes place in elementary schools which usually incorporate the first five grades and sometimes have a kindergarten.