This user thinks ohh, if you want it to be possessive, it's just i-t-s, but if it's supposed to be a contraction, then it's i-t-apostrophe-s... Scalawag.
their there they're
This user thinks that there are too many people who don’t know that they're worse than their own children at spelling!
to too two
This user thinks that too many people have no idea how to use words that they should have learned in grade two.
than then
This user understands the difference between using "than" and "then."