High school and junior high students in Healdsburg are back on campus. After more than a year away from in-person classes because of the pandemic, less than 200 students returned to Healdsburg High School yesterday. It is the first of two groups of students who will attend in-person classes twice a week. Students also returned to Healdsburg Junior High yesterday. They are some of the first secondary students in Sonoma County public schools to resume in-person learning.