Robotics Education & Competition Foundation
Online Challenges

REC Foundation STEM Educational Video

In order to help a new team better design and build their robot, create a video to teach them something about STEM concepts applied to robotics. Focus on the science, construction, engineering, and/or math of designing and building robots. You should come up with your own idea, but here are some sample ideas from previous years’ STEM Educational Videos:

  • How to calculate loads for robotics mechanisms.
  • How to build a specific mechanism such as a drive train or lifting arm.
  • How to best use specific robotics components in designing a robot.
  • How to use programming with the hardware to accomplish a specific task.
  • How to use CAD software to design and test your robot before it is built.


7121B Cable and Power Management


We are 7121B Mavericks and we wanted to make a video on cable and power management. During our process of building our robot, we spent a lot of time trying to fix the cables since some of the speed controllers and motors were not working. We wanted to make a video which shows a much more efficient process into the cable and power management.

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Beginner's Guide on Building a Clawbot

Ian Clavio

Are you interested in robotics? Do you want to build a robot? Well, VEX Robotics best suits to beginners.

Every time robotics teams recruits new members, they assign them to build Clawbots with a team. Don't know how to build a Clawbot? Don't worry, Nerd Herd Team 687A from the California Academy of Mathematics and Science (CAMS) will explain everything you need to know on how to build a VEX Robotics Clawbot.

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Gears and Gear Ratios


Our team created a video about the application of gear ratios in robotics and how to calculate them. This VEX season, we noticed that although most people know how to use gear ratios they often struggle to explain them mathematically, so we wanted to create this video to help others gain a better understanding of exactly how gears work to change a system's mechanical advantage.

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What are Gear Ratios?


5735B REC Foundation STEM Educational Video:

This is our team's entry into the educational video online challenge. For our entry, our team chose to explain the fundamental concepts of gear ratios (one of the most necessary mechanisms in Vex Robotics). We hope you enjoy, and that you are able to learn something from our video, regular viewers and judges alike!

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Split Brain Study


This is a video of our STEM research presentation on Roger Sperry's split brain study. In this study, the corpus callosum was split and the effects of this procedure was tested with patients. The language capabilities of the brain were discovered from this study and Sperry won the Medicine Nobel Prize in 1981 for his work. Click on this link to learn more:

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Introduction to Integrated Motor Encoders (IMEs)


The goal of this video is to introduce the use of integrated motor encoders (IMEs) in autonomous programming using RobotC. The benefit of IMEs over time delay programming is that IMEs give exact numerical data which can be reproduced exactly without regard for battery power. Many teams will find that using IMEs greatly improves the accuracy and reliability of their autonomous code!


Once installed, the IME provides much information by utilizing direct feedback from the motor. The speed of the motor can be determined by dividing the change...

Introduction to Controlling Lifts Using a...


Team Bext of the VEX 22283A's Educational Video...

This year's VEX EDR challenge, Starstruck, has a need of using some sort of lift to get stars and cubes to the other side of a fence. Team 22283A belives that controlling lifts is quite hard especially during autonomous, because gears sometimes doesn't have enough torque to make a lift stay at a certain position. Hence, our programmers developed a program template which would allow viewers to copy/paste our code to make an easy autonomous arm control. We hope to help new teams, like ourselves, do well in competitions...

The Engineering Process


Hello!  We are Team 4142 and this is our entry to the 2017 REC Foundation STEM Educational Video Online Challenge. 

This year, our team has decided to present the general concepts of the Engineering Design Process, a process which is rather fundamental to the development of any robot or program.  We hope that viewers will be able to grasp the ideas presented in this film, as well as enjoy the production! 

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What is Manipulators ??


Hello!  We are ROBOTECH team and this is our entry to the 2017 REC Foundation STEM Educational Video Online Challenge.

Learning by STEM is fun, you can learn a lot of rules in mechanics during Building the robot, so in this video we will talk about manipulators which we can classify it into three basic categories: Plows, Scoops, and Friction Grabbers.


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Team 7983M Basic Gear Train and Gear Ratios


This is an application for the REC Foundation STEM Educational Video for Centennial Cyberhawk's Team 7983M consisting of Cody Gregg and Garett Ellis.

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The Way 81M uses STEM


This is a video providing advice, which may prove to be beneficial for other Vex teams. 

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How to Program a Quadrature Encoder


A quick guide on how to program the quadrature encoder and also on how to make use of this encoder.

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sensor panel for learning programming and test...


We found the limitation of using CLAWBOT to learn programming, and we developed this sensor panel to further practice our programming skill with different sensors and complex control structure. And we could also use this sensor panel to test our mechanism before we put them onto our robot!

It's very useful and we hope every team could have one to practice their programming skill!!

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6135K Educational Video 2017


This is a basic video by team 6135K from Central Hardin High School on the use of a power expander.

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Cars of the Future


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STEM & VEX Robotics


We're Phoenix 2250G, a robotics team participating in the VEX Robotics Competition. This our entry for the REC Foundation STEM Educational Video, in which we show how each field of STEM are related to the VEX Robotics Competition. We hope you enjoy this video showcasing the different fields of STEM (science, tech, engineering, and math) altogether with robotics.

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Some Ways in changing the Way of Movement (Rack...


It's about how You Can construct a Worm gear mechanism and the Rack Gear one


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The Math of arms and levers


This video shows how to calculate how much weight your robot's arm will be able to lift.

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How To test a star launcher


Demonstration of A cool star launcher arm.

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Team 1826A REC Education Video - Understanding...


We wanted to create a video to pass along information to the rest of the VEX community about the VEX EDR Yaw Rate Gyro Sensor, that we learned last year.  For the Nothing but Net competition, we came up with the idea for a turreted design that would be able to automatically aim and shoot from any position on the field.  The key to being able to make a robot that could do this, was for the robot to know exactly where it was on the field at any time. At the very heart of developing that capability was the need for the robot to very accurately know what direction it was facing at...

Gear Ratios explanation


                        This educational video explains gear ratios. The most relevant points of this subject are discussed here, such as partial relations, total relations and vex concepts. You could also see a brief explanation of how you can apply all these concepts. We hope this video can help other participants and the general public to have a better understanding of gear ratios.

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Geared For Excellence


Want to know how gear ratios work and what rotational speed is? Well, this is the video for you. Team 1034A proudly presents Geared for Excellence, a crash course.



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How to Properly Tension a Chain


Overtightened or skipping chain is a common pitfall in competitive robotics. Due to either pressure on shafts or unnecessary slack, it can cause a myriad of issues including reduced speed and efficency, high current draw, skipping, sensor data loss, shock loading, and bent shafts among other things. Well tesioned chain is a foundation that will set any robot on its way to success.

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Locking System


This video describe a new and unique locking system created for our robot in this year competitions...

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Cálculos del sistema de engranaje empleado en el...


El objetivo de este video es de explicar los cálculos de Ingeniería Aplicados (STEM) en el Sistema de Transmisión del chasis y brazo del robot asi como es: Velocidad, el par, fuerza, número de motores requeridos, calculo de cuantos motores se requieren para un chasis,todo esto para que el robot de este es optimas condiciones de funcionamiento de poder ser competente.




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Solucionando un problema mecánico con una pieza...


Como utilizar una pieza impresa en 3D para solucionar un problema en el robot. 

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How to Use Gear Trains


Have you ever wondered how to maximize gears and motors? This is a step by step guide on how to understand and utilize gears in a simple, clear way.

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Nylocks vs keep-nuts


A description of nylocks (lock nuts) and keep-nuts, and when to use them.

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Planetary gear system integrated into model car


This project was designed to explore the uses of a planetary gear system. This video explains how a basic planetary gear system works and how it was integrated into a model car; it also displays the creation of actual car mechanisms, with VEX parts. 

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Motor Efficiency


This video was made by a student who was trying to egineer a motor efficiency tester for himself and his team. He did so by using formulas for efficiency and angular momentum. He ended up finding a reliable way to test the peak performance of motors, and which ones were best.

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Calculating Gear Ratios


How to calculate simple and compund gear ratios for speed and torque.

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Using Rubber Bands To Assist Your Lift


In this video we show how adding rubber bands to assist your lift enables you to score more object faster.

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Team 2223G: Motorized claw control tutorial...


RobotC Tutorial: 


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How to Stress Test on Autodesk Inventor 2015-...



We are VEX JETS Team #4073B. We are located in Quartz Hill, CA and have a total of 24 team members spread across our three teams, #4073A, B, and G. We utilize Autodesk Inventor 2015 in order to 3D model and assemble the robot virtually as well as accurately prediciting the amount of stress a part can withstand.



Fernando Flores -- scriptwriter, concept artist

Mario Sauceda -- editor, filmmaker, narrator

Edited on "Cyberlink...

Timmy Builds


Timmy demonstrates how to change a standard speed motor to a high speed motor.

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PID Control

750C (4Chainz)

This video is a short overview of how the PID loop works, its applications, and how to implement it. 

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The Design Cycle


An often neglected side of Engineering is the Design Cycle. In the link below is our video teaching a new Robotics Club member how to use the deisgn cycle to improve their robots performance.



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Hornet Engineering VEX Worlds STEM Video 2017...


In this video we discuss the pros/con and the differences between Tank and Arcade drive programs.

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Join Robotics


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The LCD Screen


This video is made by Renegade Robotics, Team 1666, and all-girls robotics team based in Melno Park, California. Our video is all about the LCD screen, and how it can be useful on your robot—both in in the lab and on the field. Download sample LCD code at

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Wheel Selection


In this video, my team and I about the different types of wheels and what they each do. We explain the different aspecs of each wheel depending pn what you want your robot to do. In this video we explain three different types of wheels: Omni direction, Traction, and Mechanical.

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Advanced Drive and Coding


In this video, team members discuss the advantages/disadvantages of drive configurations in a holo vs. H-drive review. Our lead programmer also discusses the intricacies of coding these advanced drives and compares their code structure, giving a good deal of instruction in coding these unique drive systems.

Make it happen.

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How to Build A Passive Hanging Lock


In this video, we show you how to build a passive hanging lock for your robot, in order to hang.

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Control Systems: PID


A quick introduction into the PID control loop, how it works, and it's applications in robotics.

Sample source code can be downloaded here.

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