Homophones are words which sound the same but have a different spelling and meaning.
There are three words which sound the same that we will focus on here:
there their they're
Here is a helpful way of remembering which spelling to choose.
Their means something belongs to someone. We can remember this as it has an 'i' in it.
Example: I borrowed their toy.
There refers to a place. We can remember it as it has the word 'here' in it (here and there).
Example: Let's go over there.
They're is a contraction for two words, they are. We can remember it by knowing the apostrophe is in place of the space and the a.
Example: They're going on holiday.
Let's have a go at choosing the correct spelling for these words in different sentences.