Even though English speakers in the U.K. and North America use English in mostly the same ways, small differences persist. Many of these differences are in the spelling of words. Practice and practice are one of the examples of such words.
Practice as noun:
Use of Practice:
Use of Practise:
Practise is the British English spelling of practice. Before the 20th century, practise was used as the verb form of this word in both American and British English. Today, British writers and editors still prefer to spell the verb this way, but Americans have made practice standard. Practice is also the standard spelling of the noun in both American and British English.
He grew up in Killaloe in Co Clare, down the street from Keith Wood, a fellow Munster legend, and the pair used to practise their hurling skills together. Both had notable rugby-playing dads; Brendan Foley won 11 caps and featured in the Munster side that beat the All Blacks in 1978. –The Guardian
Practice or practise:
Practice and practise are two spellings of the same word. The only differences in meaning are in their usage in American and British communities. Practice is used as both a noun and a verb; in both cases, it can have any of several different meanings. The word is always spelling practice in American English. In British English, the noun form is also spelled practice. The word is spelled practise when used as a verb in British English. You can remember this difference because Spring Bank Day is a U.K. holiday that shares the S with practise, so you can remember to use practise as a verb with British audiences by imagining yourself practising a hobby on your day off.