*Probability Explorer* (Stohl, 1999-2005)
is a research-based software application designed with tools that
enable students and teachers to design, simulate, and analyze
a variety of probabilistic situations. The software environment
can be used for activities from upper elementary grades through
high school.

*Probability Explorer * is purposefully designed as an
open-ended learning environment with multiple ways to represent
data that engage students in designing, simulating, and
analyzing results of probability experiments. At a fundamental
level, data is represented in *PE* with randomly generated
icons that can be sorted, stacked (in a pictograph) or
lined up in the sequence in which they occurred. A Pie
Graph (relative frequency), Bar Graph (frequency), and Data
Table (counts, fractions, decimals, and percents) are also available
to display results in both static form as well as dynamically
changing during a simulation.

**In April 2000,**** **Probability Explorer received
an Honorable Mention in the Learning Software Design Competition
**sponsored by the University
of Minnesota’s Design Institute.**

Contact Hollylynne Stohl Lee at Hollylynne@ncsu.edu