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String Art: Explore numerical patterns with an appealing, interactive string art model. Can you open a lock by creating the desired patterns? įactor Patterns: Explore factor relationships in this dynamic grid that displays the factors of any number. Open the Safe: A grid of lights displays patterns based on multiples. The factor patterns you’ll discover create attractive rainbows. įactor Rainbows: Find all the different ways for a bunny to hop to a location on a number line. Mystery Number: Deduce the value of a secret number by asking questions about its factors. Open the Lock: As pointers move around the dials of a lock, use your knowledge of multiples to align all the pointers facing straight up. Multiples and Factorsĭynamic Number Grid: Explore multiples and least common multiples in a number grid whose dimensions can be changed. Multiplication Is Not Repeated Addition: A double-number approach to understanding (and relating) multiplication and division. Can you locate 0 and 1 on a number line with no markings? Raz’s Magic Multiplying Machine: Experience multiplication dynamically as you drag two pointers along a number line and examine the behavior of the third pointer representing their product. Multiplication Arrays: Two visual array models of multiplication Ĭonstruct a Building and Splitting Arrays: Explore and model multiplication problems with arrays that you build yourself.
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Interactive Arrays: Create arrays of counters to model multiplication īunny Times: Develop a conceptual understanding of multiplication through this engaging multi-level game. Īdding and Subtracting Integers: A number line model helps students visualize and understand addition and subtraction of integers. Īdding and Subtracting Integers: Use an animated model to add and subtract integers on the number line. ĭecomposing Numbers: Pair a list of numbers together to form sums of 20, 30, or higher. Īrranging Addends: Arrange and overlap three circles so that the sum of the numbers in each circle matches the desired totals. Helical Number Chart: Print and attach a helical number chart to a can to create a number chart that moves continuously from one number to the next.Ĭross Number Puzzles: Addition and subtraction puzzles inspired by the great 1960’s math curriculum, Math Workshop. Addition and Subtractionĭynamic Number Chart: Use a 99 chart to model addition and subtraction Odometers ( Part 1 and Part 2): Explore place-value concepts with odometers that let you adjust each individual digit on their display. Interactive Dials: Count in base 10 or change the dials to count in base 2 or base 3, or any base of your choice. Zooming Decimals: Estimate the location of a tick mark on a number line and then “zoom in” one or more times to identify its value to the nearest tenth, hundredth, thousandth, and beyond. Zooming Integers: Estimate the location of a tick mark on a number line and then “zoom in” one or more times to identify its integer value precisely. Our blog also features many interactive Web Sketchpad activities for middle school and high school, so do explore! Place Value For a brief overview of each of these activities, go to our YouTube page. The list includes links to our original blog posts as well as links that take you directly to the interactive models without the accompanying text. Most of these activities grew out of the work that we did during our NSF-funded Dynamic Number project. Below is a complete list of all the interactive elementary-themed activities we’ve offered on our Sine of the Times blog.