The book tells how Oher 's IQ was measured at 80 when he was a child , attending school infrequently .
The book was pegged 100 to 110 after he had been at Briarcrest a while .
The book tells how Oher 's IQ was measured at 80 when he was a child , attending school infrequently , but was pegged 100 to 110 after he had been at Briarcrest a while .