Compare lengths of Unifix cube trains. Take Unifix cube train and measure a piece of string or ribbon the same length. Draw pictures of them to record their answers. Share and compare answers. Uncertainty Students use ideas of uncertainty to illustrate that mathematics involves more than exactness when dealing with everyday situations.
Students discuss the certainty or uncertainty of and distinguish between a guess and an estimate.
Participate in activities which involve anticipating outcomes, such as stacking blocks until the pile falls and then guessing at what height other piles will fall. Make predictions of outcomes in literature. Take a handful of small manipulatives and estimate how many they have. Estimate amount of sand needed to fill a large container. When it comes to uncertainty there are few things that we encounter daily that can be more useful than weather, in illustrating uncertain.