Teachers will need to create sets of coin flips and print them for students if additional classes
join in for the group random walk. Supplies needed are coins or other random number
generators, and a suitable space to conduct the Flip Trip. Having multiple classes participate
adds to the spectacle of the probability simulation.
For very small classes or schools, or if other students are not available, a single class can
repeat the experiment multiple times. Each time they form the human bar graph, they can
mark off the top of each column and then stack themselves "on top of" the prior results after
the next trial.
Preparation time for the lesson involves consideration of time and space constraints in order to
determine and arrange for a site for the random walk. The Flip Trip has been conducted in
school hallways, a parking lot, a gymnasium, and could also be held on a sports field. Markers
to show students how far to step are useful. (Tiles on a floor can serve as a built-in number
line.)
Preparing for the lesson primarily involves thinking about the possible mathematical questions
students may propose based on the experiment. Teachers should also consider which student
questions to focus on in order to reach the initial lesson goals.
Two 40-minute periods are recommended to conduct the Flip Trip and allow students to
propose their own questions, debate the questions that arise, and draw their own conclusions.
Closure on some of the important goals of the lesson may come on Day 1 if travel time to the
walk site is short.
In conducting the lesson for the first time, anticipate logistical difficulties with students moving
around in a hallway or open space. Inform other teachers who may be affected by the
movement of the students to and from your chosen location, or with your use of a hallway as a
teaching space.
Have fun! Middle school students enjoy the chance to move around, and are curious about
probability. Listen to their ideas in order to help them make connections between their initial
thoughts and their discoveries upon seeing the random walk conducted by multiple people at
once. Assess your students’ prior knowledge of probability to determine how quickly you might
move towards extensions of the activity.
Teachers will need to create sets of coin flips and print them for students if additional classesjoin in for the group random walk. Supplies needed are coins or other random numbergenerators, and a suitable space to conduct the Flip Trip. Having multiple classes participateadds to the spectacle of the probability simulation.For very small classes or schools, or if other students are not available, a single class canrepeat the experiment multiple times. Each time they form the human bar graph, they canmark off the top of each column and then stack themselves "on top of" the prior results afterthe next trial.Preparation time for the lesson involves consideration of time and space constraints in order todetermine and arrange for a site for the random walk. The Flip Trip has been conducted inschool hallways, a parking lot, a gymnasium, and could also be held on a sports field. Markersto show students how far to step are useful. (Tiles on a floor can serve as a built-in numberline.)Preparing for the lesson primarily involves thinking about the possible mathematical questionsstudents may propose based on the experiment. Teachers should also consider which studentquestions to focus on in order to reach the initial lesson goals.Two 40-minute periods are recommended to conduct the Flip Trip and allow students topropose their own questions, debate the questions that arise, and draw their own conclusions.Closure on some of the important goals of the lesson may come on Day 1 if travel time to the
walk site is short.
In conducting the lesson for the first time, anticipate logistical difficulties with students moving
around in a hallway or open space. Inform other teachers who may be affected by the
movement of the students to and from your chosen location, or with your use of a hallway as a
teaching space.
Have fun! Middle school students enjoy the chance to move around, and are curious about
probability. Listen to their ideas in order to help them make connections between their initial
thoughts and their discoveries upon seeing the random walk conducted by multiple people at
once. Assess your students’ prior knowledge of probability to determine how quickly you might
move towards extensions of the activity.
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