A Chicago kindergarten student and her mother joins the Acero Cruz teachers in their strike for a fair contract in Chicago, Illinois on December 4. <br /><br />Chicago Teachers Union president Jesse Sharkey said the strike would last "until they [Acero] come back with an offer that respects our students and the people who educate them," reported AP. <br /><br />This is the first charter school strike in the country, spanning 15 of Acero's schools, and comes after increasing teacher dissatisfaction across the US, with teachers in West Virginia securing a pay rise in March this year after weeks of mass resistance, inspiring similar actions.