A traveler guides us to the places and people that shaped the American civil rights movement. Then, homework doesn’t need to be plentiful to be effective. And, a closer look at the program in Eugene, Oregon that’s inspired cities all around the country to start sending crisis workers instead of armed police officers for some 9-1-1 calls. Also, on today’s show: how skipping a grade or graduating early might help and hurt students; why wild horses are being injected with birth control; meet a man who went below the thick ice sheets covering Greenland.