Bolinas-Stinson Union School District will have two new combined grade classrooms in its elementary program, creating larger classes with more balanced gender ratios, principal Jason Richardson said. The move comes as the district faces decreasing enrollment: this year it will educate 85 students, compared to enrollment in the “low 90s” last year and over 100 students the year before that, he said. This year, some grades were particularly attractive to combine: for instance, the fourth-grade class has six girls and no boys, while the fifth-grade class has seven boys and one girl. These grades will be combined in one classroom, as will first grade and kindergarten, the latter of which only has eight students. Second and third grades will remain separate, though their art classes will be combined. The changes resulted in no layoffs. “We are creating a better social dynamic,” Mr. Richardson said. He added that he expected the new structure to remain in place for some years, but that the district wasn’t “locked in” if enrollment shifted. In addition to the elementary school changes, the district is also further separating its math classes in middle school; the district’s math program has met criticism recently from some parents concerned about its rigor. The middle school now has three math teachers—one for each grade, with one of those teachers also covering algebra—as opposed to last year, when there were two math teachers. “It’s a significant change to our math structure,” Mr. Richardson said. The school is also hosting a math festival focusing on geometry on Sept. 13, in an effort to boost enthusiasm for the subject among students.