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).
K-12 Schools in the United States. In the United States, students usually begin a formal educational program around age five or six in kindergarten. Children then complete grade levels one to 12 before attending college or university. There are two types of kindergarten through grade 12 (K-12) schools in the United States: public and private.