One of the smallest school districts in Washington becomes the first in the nation to test a new app designed to notify a community immediately when a school lockdown is needed, and act to secure the building.

The Rainier School District in Thurston County has an elementary school, a middle school and one high school. Combined the three schools have fewer than 1,000 students and about 50 teachers.

The small district is the site of a big test of a computer application designed to provide an instant school lockdown and immediate notification of emergency dispatchers if someone shows up with a gun at school.

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