Final answer:
Keiko is at the Rainier School to protect her from discrimination and help her fit in. Japanese and Korean students faced segregation in San Francisco, and were required to attend separate schools established for Chinese students.
Step-by-step explanation:
Kieko is at the Rainier School because of the Japanese/American discrimination and the desire to help her fit in. In the early 1900s, Japanese and Korean students faced segregation and were barred from attending neighborhood schools in San Francisco. They had to attend separate schools that were previously established for Chinese students. This discriminatory action created hardships for families and led to international outrage. Therefore, Keiko's placement at the Rainier School was to protect her from discrimination and provide her with a more inclusive educational environment.