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).
Most children begin primary school at the start of the school year in which they reach school age (5 years old). All schools must admit children from the September following their 4th birthday. A school year runs from September to the following August.