Mental retardation affects approximately 3% of the population, and the background birth defect rate is 3% to 4%. An underlying cause is identified less than 50% of the time. In the cases in which a ...

Laboratory evaluation of patients with developmental delay/intellectual disability (DD/ID), congenital anomalies, and dysmorphic features has changed significantly in the last several years with the ...

Multiply by 0, 1, and 10 using the grouping of objects, counting by tens, and arrays. Explore the Multiply by 10 facts using the grouping of objects, counting by tens, and arrays. Practice with the ...