What is special education
Special education (also known as special needs education, aided education, exceptional education or Special Ed) is the practice of educating students with special educational needs so helping mentally handicapped people
Which country did it originate from?
spec ed is the practice of educating students with special educational needs, every where has and does do it
What makes the curriculum of  special education 
it depends on the needs of the kids
What age bracket can get special education?
Common special needs include learning disabilities (such as dyslexia), communication disorders, emotional and behavioral disorders so any age is eligible