Since 1990, the share of Americans with no close friends has quadrupled — even as we've never had more ways to "connect." A data-driven B2 lesson practicing the present perfect and present perfect continuous.

The Olympic Games originated in ancient Greece in 776 BCE, were banned by Emperor Theodosius I, and revived in 1896 by Pierre de Coubertin, leading to modern competitions held worldwide every four years.

Explore habit formation in the brain, as we debunk the "21 days" myth and learn about the habit loop. Then practice modals of speculation as a bonus lesson!