Simplify the following text for a Grade 7 native English-speaking person.
Original: At the end of each season , a series of playoff games are contested among the top six teams in the NFC , consisting of the four division champions ( by place standing ) and the two other teams ( `` wild cards '' ) with the best win-loss records .
Simplified: At the end of each season , a series of playoff games are played among the top six teams in the NFC . These are the four division champions ( by place standing ) and the two other teams ( `` wild cards '' ) with the best win-loss records .