This interactive SMARTboard lesson is a complete lesson in rounding numbers to the nearest ten and to the nearest hundred. It can be broken into several mini lessons followed by practice in each of the skills. It begins with a definition of what it means to round numbers. Diagrams of number lines help explain the steps in rounding numbers to the nearest ten and hundred. Lesson increases in difficulty to rounding a hundreds number to the nearest ten. The end of lesson includes practice in all areas. Great for teacher led lessons, distance learning, or even independent practice. All slides are self checking. MUST have SMART Notebook software to download and use this lesson.