# Category Archives: Elementary Mathematics

# Understanding Fraction Multiplication

# Exploring Tessellations with Web Sketchpad

# A Coordinate Plane Logic Puzzle

*Everyday Mathematics*to integrate Web Sketchpad deeply into their curriculum. As part of that work, I just completed a websketch that nicely mixes practice with logical reasoning. Students are challenged to find a hidden treasure on … Continue Reading ››

# Bunny Times Brings Conceptual Understanding to Multiplication

# Arranging Addends Puzzles Revisited

# Zooming Integers: Magnifying the Number Line

In my prior post, I presented a "zooming" number line model that allowed students to estimate the location of a point along a number line and then repeatedly magnify that portion of the number line to obtain ever-finer estimates, accurate to tenths, hundredths, thousandths, and beyond.

In a sense I got ahead of myself because I … Continue Reading ››

# Zooming in on Place Value

One of the aspects I like best about Dynamic Geometry software like Web Sketchpad is its ability to illustrate concepts that cannot effectively be represented with static media. Take, for example, a number line that we draw on a white board. Showing the number line labeled with integers is easy. Adding tenth-mark divisions to … Continue Reading ››

# Exploring Triangle Area with Custom-Built Tools

With Web Sketchpad, it's easy to craft tools that are tailor made for the task at hand. I was reminded of this flexibility several weeks ago when creating an interactive model for the elementary curriculum *Everyday Mathematics*.

My goal was to design a lesson focusing on the triangle area formula, *A* … Continue Reading ››

# Around and Around: Investigating Multiples

In my prior posts ( When Factoring Gets Personal, Open the Safe, and Reasoning with Multiples to Find the Mystery Number), I’ve given examples of how learning about multiples and factors … Continue Reading ››