Chicago is voting for its first fully elected school board. What you need to know about all 21 races

When Chicagoans head to the polls Tuesday, they’ll be making history as they elect all 21 members of the city’s school board for the first time.The showdown for the school board is the marquee race on the ballot, with Gov. JB Pritzker expected to win a third term and Lt. Gov. Juliana Stratton favored to secure retiring U.S. Sen. Dick Durbin’s seat.Many are closely watching the citywide race for school board president — a powerful position that sets the board’s agenda and, until now, has never been elected. Political action committees and individuals have funneled more than $5 million into the heated three-way race between sitting school board member Jessica Biggs, former deputy political director for the Chicago Teachers Union Hilario Dominguez and prominent defense attorney Victor Henderson.How the balance of power shakes out on the school board could also be a harbinger of February’s mayoral race. Mayor Brandon Johnson, a close ally of the CTU, appointed the majority of current schoo