I take pride in class,and class is proud of me.或者
I take pride in classes,and classes are proud of me.
take pride in /be proud of 以……骄傲,以……自豪
and 一定要加.一句话中只能有一个谓语动词（这里的谓语动词是take,is两个）,要是还有的话,必须加连词.这里的and是连词,不表示并列的关系.