Group Nouns both Singular and Plural
Singular words like: family, team, gang, which are used for groups of people can be used with either singular or plural verbs, for example:
The team is/are playing well.
Which phrase is correct – the team is or the team are?
Team is both a singular noun and plural noun the verb which is used with it depends on the speaker. If they see the team as a group of students. Use the plural if you see the team as single students.
In American English the single is used more often than in British English. ( AmE – The staff is…/ BrE – The staff are…)
There are more words which can be singular or plural nouns: