In order to define the impact of learning disabilities or communication disorders upon the student, one must define the individual's capability. One looks at achievement based upon what the individual student is able to accomplish. Therefore, if a student's IEP (Individualized Learning Plan) is followed, each student can find success, which will be defined by ability not by a presupposed standard of achievement.
The impact that learning disabilities and communication disorders have upon student achievement is grounded in a student's ability to perform in specific areas or in specific ways. To illustrate, some students with learning disabilities do not test well in high pressure situations, like time restraints. By allowing the student extra time on his or her test, the student is more likely to achieve a higher score. Similarly, while a student may not be able to write out an essay answer on a topic, he or she may be able to give an oral answer which is correct.