Simplify the following text for a Grade 5 native English-speaking person.
Original: In Australia secondary school is called high school , from Year 7 to Year 12 in every state bar Queensland where high school is started in Grade 8 , , except in Victoria , where the standard term `` secondary school '' is mostly used .
Simplified: Generally there are five to six years of high school . The first year of high school is normally either grade 7 or 8 , and then proceeds on to year 10 or 12 .