Physical Barriers to Communication Technology
Handling physical barriers when using mobile phones and radios
5 Pillars of Total Defence
5 Pillars of Total Defence.
(Ed. Note: "Defense" is preferred in American English, and "defence" is preferred in all other main varieties of English)
Social Media Users and Activities (Idioms 2)
Facebook and social media users
Folk, Pop, and Material Culture
Unit 4 Review Game : Folk vs. Pop vs. Material Culture
