The Metric Units Tutor is designed to assist you in converting a value form one metric unit to another. You can enter any metric value and then enter the same value expressed using a different metric unit. The Tutor will assess the two values to determine if they are equivalent. If not, the Tutor will make useful comments about the relationship between the two values and make logical suggestions about how your answer can be improved. The Tutor has a thorough knowledge of metric units of length, mass and volume and encourages investigation by allowing you to convert your value to as many different forms as you wish. At any time, you can receive answers to relevant questions about the form or magnitude of your value, the conversion process or about the metric system in general.