Holly Otterbein reports on whether the School Reform Commission could soon control how much city residents pay in sales taxes. Elizabeth Fiedler reports on the growing popularity of retro business signs in the Brewerytown and Fairmount areas and how they’re being used to bring together some Philadelphia neighborhoods. Franklin Institute Chief Astronomer Derrick Pitts joins Dave Heller for SkyTalk. In this week’s edition of Centre Square, Chris Satullo focuses in on the battle surrounding Obamacare. Penn Professor John Jackson joins us to discuss his upcoming talk on race at this week’s Penn Lightbulb Cafe at World Cafe Live. Peter Crimmins has the story of a trending hip-hop music style that slows things down a notch.