These two words confuse a lot of people. But really, there is no need ever to pick the wrong one again. All it takes is learning a very simple rule . . .
In a nutshell, “practice” is a noun, and “practise” is a verb. Simple! But what if you are unsure of the difference between a noun and a verb?
A noun is a naming word. If you’re talking about doing a bit of “practice” to perfect your piano-playing, or visiting your local “practice” to see your doctor, you need “practice” with a “c”.
A verb is a doing word. If you’re talking about the need to “practise” your piano-playing, or noting that your doctor “practises” medicine, you need “practise” with an “s”.
Preparation Instead Of Practice
Still unsure? Here’s a clever little trick to help you. Try using the word “preparation” in your sentence instead of “practice”:
You need more practice/You need more preparation – it still makes sense, so “practice” with a “c” is correct.
For “practise” with an “s”, try substituting the verb “to prepare”:
You should practise more/You should prepare more – “practise” with an “s” is correct. And just to double check: “You should preparation more” makes absolutely no sense, confirming that “practise” is the correct spelling in this instance.