Students learn all about the math of Wifi in this issue of The World in Numbers (TWIN). After reading an informational article, students answer higher order thinking questions related to the article content. In this issue, math concepts include metric prefixes, periodic functions, properties of graphs, analyzing graphs, evaluating functions, and (very basic) f(x)=sin x.Perfect for middle or high school students, this newsletter introduces students to frequencies, radio waves, frequency modula