School lockdowns: What’s the difference between a modified vs. full lockdown?

The U.S. Department of Homeland Security defines two types of lockdowns used in schools across the country — modified and full lockdowns. Here's when each is typically used, and what they mean for staff and students.
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The U.S. Department of Homeland Security defines two types of lockdowns used in schools across the country — modified and full lockdowns. Here's when each is typically used, and what they mean for staff and students.

Allison Needles covers news in Puyallup, Sumner and Bonney Lake for The Puyallup Herald and education news for The News Tribune in Tacoma. She was born and raised in the Pacific Northwest.