It's an old complaint: the Left just doesn't get its message through. You'll often hear progressives complain that the Democrats don't phrase their ideas well enough, or that the media is against us, or that the American people are too distracted by their electronic devices, etc.
But that's actually not true. There may be some failure in terms of deeper narrative framing, but at a policy level most Americans agree strongly with most progressive positions.
This is becoming more and more true in education. One of the bigger problems at this point is simply getting pro-public education candidates to run against people like Rahm Emmanuel, Andrew Cuomo or for that matter, Hillary Clinton.