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This interactive applet helps develop number sense. The user mentally estimates a number that is represented by an arrow on a number line and then checks the estimate by clicking to have the exact number revealed. Users can choose a number range for whole numbers (between 0 and 10, 100, 1000 or 10,000) or decimals (tenths or hundredths between 0 and 1). An optional scale of tick marks provides guidance. The activity does not provide a scoring component.

Learning Registry Activity


    Topics and Grades

    Grade: PS/Pre-K to 12

    Topics: Counting & Place Values, Estimation & Rounding, Number Sense, Education, Child Development & Family Services, Mathematics, Positive & Negative Numbers

    Resource Pedagogy

    Resource Type/Classification:

    • Teacher Materials
    • Interactives

    Tool for: Students