Remedial teaching is helpful for removing learning difficulties of weak students. Remedial education (also known as developmental education, basic skills education, compensatory education, preparatory education, and academic upgrading) is education designed to assist students in order to achieve expected competencies in core academic skills such as literacy and numeracy. Whereas special education is designed specifically for students with special needs, remedial education can be designed for any students, with or without special needs; the defining trait is simply that they have reached a point of under preparedness, regardless of why. For example, even people of high intelligence can be under-prepared if their education was disrupted, for example, by internal displacement during civil disorder or a war.