“School choice” wouldn’t emerge onto the national scene until after Brown v. Board of Education (1954) and the various forays into moral corruption and social decay wouldn’t become staples of the nation’s highest court until a decade after that. The rest of the Lochner Era was largely about how freedom meant letting corporations do whatever they wanted to workers because those being exploited had just as much theoretical control over the outcome as their gilded overlords did. (They didn’t put it in those exact terms.) Between 1897 – 1937, the Supreme Court struck down nearly 200 different statues, most as violations of “freedom of contract” or other violation of “economic substantive due process.”
The Lochner Era (1897 – 1937), however, is named for a case representing a judicial philosophy which dominated the nation’s highest court for nearly forty years. For over a generation, the Court pushed back against the reform efforts of the Progressive Era and gave FDR fits by overturning many of his best efforts to regulate industry during the Great Depression. They laid the foundation for the modern “school choice” movement by uncovering new rights related to parenting and families. In the process, they brought to life an understanding of the Fourteenth Amendment that would end up securing the rights of American citizens to contraception, gay sex, and abortions.
The dilemma of any effort to compile “must know” Supreme Court cases is deciding where to draw the line. If you narrow it to a list of 12, there are at least 3 or 4 others that really MUST be added in the name of consistency. If you expand the list to, say... 24, you're sacrificing another half-dozen that should simply NOT be neglected if you're to retain ANY credibility.