The young people were re-educated at the summer camp to embrace new values.

re-educated 是动词 re-educate 的过去分词形式。re-educate 由前缀 re-（表示"重新"）和动词 educate（教育）组成，字面意思是"重新教育"，指通过教育改变原有的观念或行为方式。