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 language instruction is provided (1) for kindergarten through grade six, at a minimum, in language arts (including reading and writing) and in mathematics, science, or social science; or (2) for grades seven through twelve, at a minimum, in two academic subjects required for grade promotion or graduation.