Dassel's first schoolhouse was built in 1870, at a cost of $625 and with only three months of school beginning on October 15, with Mrs. W. C. Russell as the teacher. She had 28 pupils and a salary of $25 a month. In 1873, Sarah Phelan became the teacher at $30 a month with a four months school term and 44 students. Dassel, at that time, had just 227 citizens. In 1878, a new $1500 two-story building was built with two rooms, one up and one down, and in 1883 the downstairs was divided into two rooms. The old schoolhouse was sold to the Swedish Lutheran Church and used by them until 1886 when a new church was built. The old schoolhouse church was sold and made into a house. The new school building was in use until 1886 when an $8000 building was built. The old schoolhouse was then sold to the Village on April 8. 1887 for $300 and moved to Lot 17 in Block 8, where it was used as a Village Hall and the Firehouse until 1912 when it was sold for $147, torn down, and the lumber hauled away by the owner. The Auditorium was built in that year and in use until February 24, 1930, when it was destroyed by fire. A semi-fire proof municipal building was built in the same year. The first principal of schools was J. H. McKenney.