This is one of the mistakes I see so often in students’ (and sometimes teachers’!) written work.
1. I must practice my English speaking more in order to improve.
2. In this class I will give students extra practise in pronunciation.
These sentences are incorrect. So, what’s wrong with them? Well, in number 1. it should be practise (the verb) and in number 2. practice (the noun).
The reason people often make mistakes is because the pronunciation of the 2 words is the same. A way to make sure you always use the correct word is to think about a similar pair of words; advice (the noun) and advise (the verb).
Here, advice the noun is pronuounced ‘ice’ as in ice cream and advise is pronounced ‘ise’ as in rise, whereas both practise and practice are pronounced ‘iss’ as in miss.
Try a substitution exercise for sentences 1 and 2 above to help you remember the spelling:
1. I must ______ my English speaking more in order to improve.
What fits grammatically, advice or advise? Advise so the correct form = practise
2. In this class I will give students extra ______ in pronunciation.
What fits grammatically, advice or advise? Advice so the correct form = practice
Or in short:
s for a verb
c for a noun