Teachers say 1 in 4 schools had gun lockdowns last year. 

Lockdowns happened in US schools due to gun threats. 

Teachers worried as schools  faced gun-related emergencies. 

Some schools experienced multiple lockdowns. 

Students and teachers  practiced safety drills. 

The lockdowns affected  teaching and learning. 

Teachers want solutions to keep schools safe. 

Gun safety measures are necessary in schools. 

Communities need to address  gun violence issues. 

Schools must ensure safety for students and staff. 

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