The First Amendment: Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievance.
After your preliminary reading of cases, you can find full text of your case here. Add your case name (ex. Tinker v Des Moines) into this Google search bar to find the full text of your case at Cornell's Legal Information Institute (LII). If that doesn't work, try one of the other links.
Remember, you must find a case that has at least one DISSENTING opinion.
Head to these sources when ready to hear other interpretations of your case and the issues involved.