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).
Typical ages and grade groupings in contemporary, public and private schools may be found through the U.S. Department of Education. Generally there are three stages: elementary school (K-5th/6th grade), middle school (6th/7th-8th grades) and high school (9thâ12th grades). Some schools differ in the grades they contain.