1. Yes, you should submit recommendation letters and transcripts when submitting an application form.
2. Yes, you need to get all 9th grade transcripts from different schools.
3. Yes, you should have official transcripts and recommendation letters with a school seal.
4. If possible, recommendation letters should come from teachers who currently teach the child. Nevertheless, recommendation letters from the previous schools would not hurt either. The important point is that a teacher who knows the student well enough should write a recommendation letter.
5. Leaving teacher's phone number would be fine with permission from him/her. Contact information with an email address should be good enough for further communication.
其实推荐信找老师签字也是很繁琐的事情,建议大家统一用ssat 的统一表格, 学校都会接受, 不会有区别对待。
还有具体推荐信老师, 最好是当年的, 因为很多学校讲明current english teacher and math teacher. 数学和英语老师最好要, 因为美国学校最看重这两科。然后你再找班主任和或年级组长或教导主任。