영어 문장 해석 부탁드려요 ^^

공부하는 책에서 본 문장인데 구조가 잘 안 보이고 해석도 어렵네요.
도움 부탁드려요~
1. How successful we are at forming good relationships and how valued we feel by other people make a big difference in how good we feel about ourselves.
2. Yet we can, by using what we have to the fullest, stand out from the crowd.
3. With young, inexperienced teachers being thrown into classroom to meet new federal standards, as much as 90 percent of the burden of instruction rests on the textbooks, claims Frank Wang, a textbook expert.