Students in grades nine through 12 attend Northern Lehigh High School in Slatington.

Students in grades nine through 12 attend Northern Lehigh High School in Slatington.

A school also operated for a time in the second story of the Lehigh Slate Company's store.

A.G. Hamed, pastor of the Presbyterian congregation, maintained a private school in the church.

In 1875, Professor Frank J. Stettler, who directed the grammar school for two years, became the principal.

He re-graded the schools, established a better classification, and introduced a regular course of study.

At this time, the attendance increased considerably and another primary school was opened in the McDowell Hall in Slatington.

Beginning in 1875, Professor Stettler conducted a Summer Normal Institute for thirteen years during which time approximately 150 young men and women graduated as teachers.

Two night schools were conducted for several years, one attended by quarry and factory boys, the other by teachers and advanced pupils.

The first course of action in the new century involved the 1905 construction of the Franklin School House in Emerald, Washington Township.

Little occurred for the school district over the next twenty years, until, in 1937, the new Smith Hall Athletic Complex was constructed, giving a home court for the Slatington Slater basketball team closer to their home high school, located one block away.

An addition was added to the Slatedale Building while Peters Elementary was constructed in Friedens.

At the end of the decade, in 1959, construction of the new high school at 600 North Diamond Street on Kuehner Hill was completed.

The district is now composed of the Boroughs of Walnutport, Slatington, and the Township of Washington; a total of 27 square miles (70 km2).

Also in this year, the former Smith Hall Athletic Complex was demolished in order to build housing for the elderly of Slatington.

Two years later, the Peters Elementary building was renovated, adding another two-story wing.

Each school has been beautified with various murals and Northern Lehigh banners flying on their premises.

Renovations to Slatington Elementary were completed in the fall of 2011, converting the school from an open-concept building to a classroom setting.

Just a year later, a fully synthetic turf field was installed at the newly renamed Bulldog Community Stadium, which allowed soccer and field hockey matches to be played in the stadium on a full-time basis along with football.