The following are some other activities that are useful for judging the reasonableness of solutions. A student who is using a measurement tool to collect the data will associate the appropriate units with the physical attribute . When calculating measurements using more than one kind of data, have them check for the reasonableness of the units in their answers. Dimensional analysis is a good way to check to see if your answer is reasonable when you are calculating problems with multiple types of units. The development of the concept of place value is important for students to acquire in their early elementary years.
Manipulative experiences help children appreciate how different one, ten, and a hundred are.
Math manipulatives are also useful for students to correct their own errors. When you ask your students to organize and graph data they collect in laboratory work, you have the opportunity to check on their mastery of a variety of skills and knowledge. Don't always give them charts and graph axes that are already labeled.