My twin daughters just started elementary school I am so full of happiness. 
That's so sweet! What ages are they? For elementary school, obviously they're somewhere between 6 and 12, as US elementary schools have 6 grades, with those ages corresponding to them. But they've been 6 to 10, and 6 to 14, as well, in some areas.
They are 5 they will be turning 6 in November they love it so far which is great because elementary years is the most important in schooling it shows them the importance of education. 
That's pretty cool! Ages for elementary school vary by country, so sometimes it can be much different. But in the Western world, elementary school is always just one part of the compulsory education that's taught and required.
Yes it is required where we live as well kids have to start if they are 5 it's the law and I agree the teaching style etc. is different from state to state heck even county to county. 
In China, it's not wildly different, but slightly. All people must go to school for nine years, at least. So, six years of primary education, at 6 or 7, and then three years of junior secondary education from 12 to 15. Then they have three years of senior middle school. It's funny how it's still slightly similar.
I can see the similarities lol not that much of a difference just seems as if they start at 6 where in US students can start at 5 for Kindergarten long as it is by September.
accreditation available through independent regional accreditation authorities, although some state regulation can apply.
In 2013, about 87% of school-age children (those below higher education) attended state funded public schools, about 10% attended tuition- and foundation-funded private schools, and roughly 3% were home-schooled.
By state law, education is compulsory over an age range starting between five and eight and ending somewhere between ages sixteen and eighteen, depending on the state. This requirement can be satisfied in public schools,
12, but some elementary schools have four or eight grades, i.e., up to ages 10 or 14 (also known as the intermediate grades). Basic subjects are taught and pupils often remain in one or two classrooms throughout the school day, except for physical education, library, music, art, and computer classes. In 2001, there were about 3.6 million children in each grade in the United States. "Middle schools" and "junior high schools" are schools that span grades 5 or 6 to 8 and