This document discusses the tides and how they are influenced by the moon's phases. It begins with an introductory activity to refresh knowledge of moon phases. It then explains that tides are caused by the gravitational pull of the moon and sun, which causes bulges in the oceans. Spring tides occur during full moons and new moons when gravitational forces are strongest. Neap tides occur during quarter moons and have weaker tides. The document includes diagrams and activities to illustrate these concepts. It concludes with assigning students into groups to create posters about different moon phases and their effect on tides.