The budget uncertainty that education advocates and school districts have lived with for the past two years doesn’t seem likely to go away anytime soon. The across-the-board cuts known as “sequestration” that went into effect last March are still in place. And now, a spending showdown driven by conservative Republicans in Congress over whether to defund the president’s landmark health-care law means a government shutdown could be in the offing. Plus, there’s likely to be yet another fight in October over raising the federal debt ceiling. Here’s a handy guide to what’s happened so far and what to watch for.