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Using the Lego®EV3 in the Classroom

NSWC Crane STEM

Page | 1, Using the EV3 in the Classroom, NSWC Crane STEM

Details, Details, Details…………………………………………………………………………………………………….……..3

Lego Olympics……………………………………………………………………………………………………………...….4-11

MindStorm Math………………..……………………………………………………………………………………………….12

Geometry MindStorms………………………………………………………………………………………………………….13

Detecting Distance……………………………………………………………………………………………………………….14

Exploring Slope Using MindStorms…………………………………………………………………………………….…..15-16

Speed versus Power …………………………………………………………………………………………………………17-19


Details, Details, Details

Details are very important when it comes to building your robot and programming your robot. Below, give a detailed list how you create a peanut butter and jelly sandwich.

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It's the little details that are vital. Little things make big things happen.

John Wooden

http://www.brainyquote.com/quotes/authors/j/john_wooden.html


Lego Olympics

The 2 Meter Dash

Robot will start on piece of tape on the floor. Robot must be programmed to land on another piece of tape two meters away, in a timely fashion.


Bobsled

Robot will start on piece of tape on the floor. Robot will be required to make a complete turn at a given line and return to start line quickly.


Fencing

Robot will be required to compete against another robot team to race to a line without crashing into opposing team coming from opposite direction.


http://www.hasslefreeclipart.com/clipart_sports/images/fencing.gif

Curling

Robot will be required to approach a ball without hitting it while starting from a given line. Robot with the closest distance to the ball wins.


Slalom

Robot will be required to complete the course of pipes in a timely fashion.

Lego Olympics RubricPage | 9, Using the EV3 in the Classroom, NSWC Crane STEM

Team Name _______________________________Robot Build ________/9 pts.

0-3 points for robot with pieces not correctly placed

4-7 points for robots with pieces correctly placed

8-9 points for robots with all pieces correctly placed and added individual enhancements

Two Meter Dash ________/ 3 pts.0 points for robot not completing the

task

1 point for robot completing the task but with a time in the bottom third tier of competition times

2 points for robot completing the task but with a time in the middle third tier of competition times

3 points for robot completing the task but with a time in the top third tier of competition times

Bobsled ________/ 3 pts0 points for robot not completing the

task




Fencing ________/ 3 pts0 points for robot not completing the

task

1 point for robot attempting task and not landing on tape

2 points for robot completing the task but crashing into another robot

3 points for robot completing the task and not crashing into other robot


Curling ________/ 3 pts0 points for robot not completing the

task




Slalom ________/ 3 pts0 points for robot not completing the

task




Total points ________/24 pts

MindStorm MathStudents can use the MindStorm to complete measurements and to predict measurements as well.

Program the robot to go 1 rotation. Measure the distance and record that distance here. _____________Page | 11, Using the EV3 in the Classroom, NSWC Crane STEM

Program the robot to go 2 rotations. Measure the distance and record that distance here. _____________Program the robot to go 3 rotations. Measure the distance and record that distance here. _____________What is the pattern? _________________________________________________________________________What do you predict the distance to be for 7 rotations? ___________________________________________

Mathematically, we can predict without even programming the robot based on the circumference of the tire. Measure the diameter of the tire and record it here ________________. Multiply the diameter by 3.14 (π ¿ to find the circumference, record it here, ______. How does this measurement compare to the 1 rotation? ___________________Using math predict the distance for 7 rotations. _______________________________________How does this compare to the distance predicted from the top section? ________________________________Program the robot to go for 7 rotations. Measure the distance and record it here, ________. Which number did it compare the most to, your prediction based on distance or your prediction based on math? Why? ______________


Geometry MindStormsYou can use the robot to create a shape on the floor. The basic shapes that most students know are circle, square and triangle. We will explore these and hopefully work up to more complex

shapes of hexagons and octagons.What are the basics that we know about squares….Number of sides ______, Angle degree measure _______How would the programming look if you were programming the robot to complete a square?_______________________________What are the basics we know about triangles… Number of sides ______, Angle degree measure _______How would the programming look if you were programming the robot to complete a triangle?How would you program a circle? ________________________________________


Detecting Distance

Students will use the ultrasonic sensor to detect distance. Using the Wait Block on programming, students will learn how to avoid obstacles.

On the wait block, tell the robot to stop or change course when it gets close to an obstacle.

How can a loop be incorporated into this?


Exploring Slope Using MindStormsStudents will be given various power levels to explore slope using time and distance. Students will use the power level and record the distance for various time increments.Power Level _______________%Record the distance for each of the times listed.0.5 seconds ________ 1 second ________ 1.5 seconds __________ 2 seconds __________2.5 seconds ________ 3 seconds ________ 3.5 seconds __________ 4 seconds __________4.5 seconds __________ 5 seconds __________

Plot your data on the graph. The time can be plotted on the horizontal axis distance and the distance can be plotted on the vertical axis. (time, distance) You will need to label your axis points.


Distance traveled (cm)

What is the pattern that you notice? _______________________________________________________Choose two points and find the slope between them.

What is the equation of the line, using the slope and y-intercept? ___________________________________

Using the equation of the line, predict what the distance will be at the following times,10 seconds _____________ 15 seconds _______________

Program the robot to run for 10 seconds and 15 seconds and compare the results with your findings.


Time taken (in seconds)

Speed Versus PowerWhat is the difference between speed and power? _____________________________________________________Set robot to drive for four rotations at the following power levels. Time your results for the robot to complete the task.20% power ____________sec 50% power ____________sec 100% power ____________sec

Fill in the following chart with five trial runs at each power level. Find your average time and plot it on the graph.Power Level

%Run 1 Run 2 Run 3 Run 4 Run 5 Average

102030405060708090100

You must label the axis for time and the axis for power.


Draw a line of best fit through the data that you collected. Based on the data that you collected, how long do you think that it would take for your robot to go 5 rotations for 55%? ________________________________________


Power Level

Time taken for five rotations (sec)

Converting Time to Speed

If a robot takes 12 seconds to go five rotations and travels 27 inches, then the speed can be calculated as follows:

speed= 27 inches12 seconds

=2.25inches /second

How far does your robot travel in five rotations? ___________ Calculate the speed for each of your average times at each power level.

Power Level % Average Time for rotations Speed (inches/seconds)102030405060708090100

Plot the speed of the robot onto the graph below. Label your axis for inches as well as for the power level.


Inches per second


Power Level

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