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).
The Elementary School results displayed on GreatSchools profiles are for grades 3 through 5 combined for each subject. Middle School results are for grades 6 though 8 combined, and High School results are for grades 10 though 12 combined.