Absolutely. IQ is only an average of many different learning skills, which means it’s possible for someone who has “normal” intelligence to have scored high on some skills and low on others. And if those “low” scores are in the skills required for reading or math, then reading or math achievement will be low even though IQ is “normal.” Read more about the misinterpretation of achievement and IQ test scores.
If your child scored low on a phonemic awareness subtest (a necessary skill for reading and spelling) but high on all the others, his IQ would be considered normal or above. You would be told that because your child has the potential (IQ) he will need either more motivation or additional instruction while completely ignoring the cause of his difficulty – poor phonemic awareness!
The cause will go untreated, and the struggles will continue. Not assuring that your child has the adequate underlying learning tools for learning is like asking someone to build a house today with nothing other than a hammer, handsaw, and a screwdriver.