Student can benefit from coaching for the Opportunity class test. More advanced students benefit from a different approach to material. Coaching does not teach more facts; it looks at how students can draw ideas from the facts given, how they can be creative with information, and how they can use their abilities.
General primary school classes have to cater to the common denominator of the class. Such a generic approach can have is disadvantages for individuals with potential. Tutoring for Opportunity classes can take students beyond the limits imposed by general education, encouraging lateral thinking and original insight. Individuals with potential can do well on OC tests and other general intelligence tests once they are taught the correct approach and start to develop a deeper understanding.
A more advanced understanding is a difference of type, not of degree. Students with potential can feel held back by conventions. Some advanced coaching often allows a student to get beyond wrote learning and see the connections between and within facts. Independent thinking will give a student an edge when it comes to the type of intelligence tests used for OC classes.