**How well can you predict your candy haul?** - Students consider how to determine their best predictions of their candy haul. The math ideas of measurement error and percent error are introduced. Students then predict their own Halloween candy collection numbers and compare their predictions to their actual haul using measurement and percent error.

**Make a ghost costume from a sheet** - In this activity young students can reason about the potential of a sheet, cut in a very defined circular shape, becoming a Halloween ghost costume. Notions of head diameter, sheet length, less than and greater than will all come into their reasoning.