Save some money. Measurable goals clearly define what it is we're going to do. For Ann and Liv, their goal is to ski across Antarctica. This means that they won't be bringing dogs to pull their sleds. Or traveling by snowmobile.
Measurable goals are goals that can be quantified.
To complete the trek in 100 days. Ask students for other examples. They say exactly what action we're going to take. Ski across Antarctica. Educate schoolchildren around the world.