History in brief:
1973 Several leaders of WELS and ELS congregations in Washington, Ozaukee, and Dodge counties gather to discuss a proposed Lutheran high school in the northern Milwaukee metro area.
1974 KMLHS opens with an enrollment of 35 students in grades nine and ten at the temporary facility of Christ Lutheran Church in the village of Jackson.
1975 Forty-eight acres of land are purchased along Division Road in the town of Jackson for $36,500.  A federation of congregations is organized.
1976 KML breaks ground for a 21,760 square foot building.  The KML federation totals 14 congregations.
1977 KML moves into the new facility.  First senior class of 15 students graduates. 
1980 Student body grows to 230, groundbreaking for $800,000 gymnasium/classroom addition, first Echo Fest.
1989 Central IMC space renovated into library and media center.
1993 Groundbreaking for 11,000 square foot, $500,000 classroom addition.

Dedication of the Project Grow addition (Business office, home ec. classroom, and science facilities expanded.  Student body numbers 315. 
Computer Assisted Drafting and Design (CADD) purchased through Ladies Guild and Thrifty Nickel retail store.
1999 Computers on Wheels (COWS) funded by KML’s First Annual Auction through Friends/Founders.  KML celebrates its 25th year.  Student body numbers 390.  Twenty-six congregations from five counties make up the KML federation.
2001 Groundbreaking for Time to Grow expansion.
2003 Dedication of Phase I Time to Grow project takes place on October 5.  Education wing, kitchen, cafeteria, new and remodeled gymnasiums, and locker rooms are part of the $5.5 million expansion.  Outdoor athletic fields change the entire look of the KML campus.
 2004 Dedication of the Green Machine wastewater treatment project. 
 2011 Soccer bleachers were added to the outdoor sports facilities.
 2012 Groundbreaking for the Performing Arts Center and fine arts academic wing
 2015 Outdoor lights added to the football field which was renamed Catalyst Coliseum
 2019 Groundbreaking for the Science & Innovation Wing

Click here to read the complete history of KML.