What are three things that all kids should learn in school?

Erugent which russian tsar defeat napoleon and saw himself as the leader of european monarchs who opposed revolutionary change ivan the terrible ivan the great nicholas 1 alexander 1

What specific events led richard nixon to resign the presidency

The rise of advertising in the 1920s. i am good with seeing how advertisements shape the roaring twenties and how it developed a new way of life through modern days. but i am not sure what the details of advertising in the 1920s were. if possible can you send me links (preferrably credential links) to sources that maybe show like the first company to start advertising through the radio, how advertising benefits (statistics graphs), etc.