Each group needs:

• LEGO MINDSTORMS EV3 robot, such as EV3 Core Set (5003400) at https://education.lego.com/en-us/products/lego-mindstorms-education-ev3-core-set/5003400#lego-mindstorms-education-ev3 (includes programmable EV3 intelligent brick; 3 2 interactive servo motors; sound, color, ultrasonic and 2 touch sensors; and many other components and instructions)
• LEGO MINDSTORMS Education EV3 Software 1.2.1
• computer, loaded with EV3 1.2.1 software, free online, you have to register a LEGO account first; at https://www.lego.com/en-us/mindstorms/downloads/download-software
• GetInGearProgram.ev3 program
• Get in Gear Worksheet, one per two students
• Get in Gear Pre-Activity Quiz, one per student
• Get in Gear Post-Activity Quiz, one per student

To share with the entire class:

• colored tape, to mark race lines on the floor
• a number of different sized books or notebooks, to serve as obstacles for the robots to push

Note: This activity can also be conducted with the older (and no longer sold) LEGO MINDSTORMS NXT set instead of EV3; see below for those supplies:

• LEGO NXT robot, gears and software, as provided in the LEGO MINDSTORMS NXT robot, such as the NXT Base Set 
• LEGO MINDSTORMS Education NXT Software 2.1
• computer, loaded with NXT 2.1 software
• GetInGearProgram.rbt program