Direct instruction refers to a n approach to teaching children with learning disorders based on the premise that to improve a skill the instructional activities have to approximate those of the skill being taught.
Other /More definition:
Direct instruction is defined as the presentation of factual information by lecture, demonstration, and practice. Moreover, Direct instruction is an approach to teaching children with learning disorders based on the premise that to improve a skill the instructional activities have to approximate those of the skill being taught. It is telling a child what to do, when, and why.