057 practice and practise - the difference

Difficult English Words Practise / Practice In many parts of the English speaking world (UK, Ireland, Australia, Canada, and South Africa) “practice” is the noun, “practise” the verb. However, in the U.S.A the spelling “practice” is more often used for both the noun and the verb. Contrary to popular belief a significant minority of the American population also observe the distinction. If you are not sure about what a verb or noun is, it might be safer to just use the spelling "practice", as many Americans do!

In the US, you can use practice for noun and verb. In the UK, you must use practice for the noun, and practise for the verb. For example:

Shall I practice my handwriting?  ()  ()

Practice makes perfect.  ()  ()

Some in the US are now following the UK convention. So:

Shall I practise my handwriting?  ()  ()

Read more at http://www.grammar-monster.com/easily_confused/practice_practise.htm#qBMKjoHCmJHJbb7l.99