Inadequate educational facilities result in inadequate educational achievement of indigenous peoples and lead to lack of assimilation into the national culture and persistent social and economic subjugation. Such inadequate facilities may arise from discrimination against indigenous peoples at the national level or inadequate policies to cope with the linguistic problems caused by a wide variety of unilingualist groups. Also, inadequate provision is made for the fact that children often have to work from the age of nine onwards, and that in so doing they may also become migratory. Isolation and wide geographic distribution also contributes to the difficulties in providing adequate education. Without sufficient education, indigenous people cannot be assimilated into the national culture and remain in an underprivileged position.