With more than 150,000 Florida children already in their desks, the state and teachers unions squared off Friday in a legal battle over Education Commissioner Richard Corcoran’s mandate that local school officials resume in-person instruction this month amid the coronavirus pandemic.Leon County Circuit Judge Charles Dodson, who is slated to issue a ruling early next week, heard closing arguments in lawsuits filed by the Florida Education Association and the union that represents Orange County teachers.The unions allege that a July 6 emergency order issued by Corcoran requiring brick-and-mortar schools to reopen five days a week in August violates the state Constitution’s guarantee of “safe” and “secure” public education.