American English takes a slightly different approach to the agreement of verbs with collective nouns. There is a very strong preference for the use of singular verbs with such nouns, so in American English you are much more likely to see, for example:
By Dr Ananya Mandal, MD. The human brain is divided into two hemispheres. The left hemisphere is the logical brain and is involved in language and analysis and the right hemisphere is the creative brain, involved in daydreaming and imagination. The left hemisphere controls the right side of the body while the right hemisphere controls the left side.
Literacy as an Outcome of Language Development and its Impact on Childrenâs Psychosocial and Emotional Development. September 2010, 2nd ed. One of the most striking accomplishments of the preschool years is the childâs effortless development of speech and language. With respect to spoken language development, the preschool years represent a period of learning language.