Scott Heins / Getty Images The Oklahoma legislature, under pressure all week from thousands of striking teachers across the state, passed a series of changes to the tax law on Friday that are anticipated to increase education funding by tens of millions of dollars — even as the walkout continued. The Oklahoma Education Association estimated about $81 million could be raised by three separate measures, which were passed by both chambers. The teachers want Gov. Mary Fallin to sign two and veto one. One bill, called the "Amazon tax" and focused on out-of-state companies doing business in Oklahoma, will raise about $20 million.