I've never missed, I guess I should practice more. And practice is spelled with two "c"s.
Taken from werriam webster
practice2 entries found for
practice.
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practice[1,verb]practice[2,noun]
Main Entry:
1prac·tice 
Variant(s):
or prac·tise 
/'prak-t&s/
Function:
verb
Inflected Form(s):
prac·ticed or prac·tised;
prac·tic·ing or prac·tis·ing
Etymology: Middle English
practisen, from Middle French
practiser, from
practique, pratique practice, noun, from Late Latin
practice, from Greek
praktikE, from feminine of
praktikos
transitive senses
Even an immature know it all like you should know that practise can be spelled two ways.