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 academic term for senior high school (grades 11 and 12) operates on a semestral basis. Semestral, Christmas, and summer breaks are scheduled at about the same time as primary and junior high school. Grade 12 pupils have a shorter second semester than grade 11 in order for the school to prepare for graduation.