Inclusion Criteria:  Children aged 6-8 years old Intelligence Quotient (IQ): Participants with a Full Scale IQ > 70 on the Wechsler Abbreviated Scale of Intelligence (WASI-II). Identification of Mathematical Learning Disabilities: Scores below the 25th percentile on symbolic number processing test in Numeracy Screener and two or more Wechsler Individual Achievement Test (WIAT-III) math subtests Identification of typically developing children: Scores at or above the 50th percentile on symbolic number processing test in Numeracy Screener and all WIAT-III math subtests Right-handed Normal or corrected-to-normal vision and no hearing impairments  Exclusion Criteria:  History of neurological or psychiatric disorder (i.e., schizophrenia, psychosis, depression, or attention deficit hyperactivity disorder.) History of trauma involving head injury Consistent psychiatric medications No major contraindication for magnetic resonance imaging (MRI) - braces, metal implants, pacemakers, vascular stents, metallic ear tubes, consistent exposure to metal, claustrophobia) Low birth weight (under 4.4lbs) or significant difficulty during pregnancy, labor, delivery, or immediate neonatal period Pregnancy