first question:The best reason for the success of the progra

first question:The best reason for the success of the program may be that it makes every child watching it feel able to learn.这句话中,这句话是表语从句还是宾语从句?奇怪的是,makes是谓语动词,那为什么这里还出现了一个feel,而它的形式不是非谓语的形式?
second question:Many teachers also consider it a great help,though some teachers find that problems arise when first graders who have learned from "Sesame street" are in the same class with children who have not watched the program.这个句子中,分为几个什么从句,那这种多重从句引导词是引导主句呢还是前面一个从句的?