关于推荐信

想问下大家都是怎么弄的。

大家都是按学校提供的表格一个一个添上去找推荐人签字还是让推荐人写了一封信，然后就邮寄这个呢？

You should give them what they asked for.  If you have to mail a letter, at a minimum, it should answer the individual questions on the application form.