Blake, a high school student at Glenbrook Academy, a California private school, was suspended for displaying bumper stickers supporting Joe Biden for president on his personal notebook. When asked to put the notebook away by an offended teacher, he complied. Regardless, his headmaster suspended him. Blake felt his First Amendment rights had been infringed upon, and he sued.

1. The Supreme Court case most useful for Blake that we have covered is _________. (Please type only the Plaintiff's name for the case, one word.)