I'll need more context to give you a better answer, but from what you've provided: Sarah mean that her father didn't see the kind of person they really are. It seems as though he judged them based on looks or first impressions, and didn't give them a chance to show who they are as a person.
It takes into consideration communicative dimension of language. CLT provides vitality and motivation within the classroom. CLT is a learner centered approach. It capitalizes on the interests and needs of the learner
