Simplify the following text for a Grade 5 native English-speaking person.
Original: The cards were discarded for the 1978 version , replaced by flipping panels that had the dollar amount on one side and the clue on the other ; the curtain was also replaced with double slide panels .
Simplified: In 1978 , the cards were dropped in favor of flipping panels which had the dollar value on one side and the clue on the other . Also , the curtain was replaced with double-slide panels .