A northwest suburban school district should block transgender students from using locker rooms and restrooms that align with their gender identity while a challenge to that practice is pending, a lawyer argued Monday.Jeremy D. Tedesco of the Alliance Defense Fund in Scottsdale, Ariz., contended allowing access to facilities in Township High School District 211 based on students’ “biological” sex would simply return matters to the status quo while the case works it way through the courts.Sex-segregated …