To share with the entire class:

• 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 (all necessary pieces, including the LEGO MINDSTORMS EV3 brick and additional required LEGO parts for the robot set-up are included in the Core Set; see instructions for the robot set-up at https://www.youtube.com/watch?v=Dhe2jXi3Fc4. Note: Pre-program the brick using the programs and set-up instructions in the Attachment section.)
• LEGO MINDSTORMS Education EV3 Software 1.2.1, free online, you have to register a LEGO account first; at https://www.lego.com/en-us/mindstorms/downloads/download-software
• computer, loaded with EV3 1.2.1 software
• tape (colored paper tape)
• a large circle of construction paper to represent an analog clock. (Note: Make the circle radius large enough for the robot to mimic the hour hand of the clock. Use a large protractor or compass to draw the circle.)
• markers, colored pencils or crayons
• Robo Clock Pre-Assessment, the Robo Clock Data Worksheet, and the Robo Clock Post-Assessment, one each per student

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 MINDSTORMS NXT robot, such as the NXT Base Set (all necessary pieces, including the LEGO MINDSTORMS NXT brick and additional required LEGO parts for the robot set-up are included in the Base Set; see instructions for the robot set-up at http://www.nxtprograms.com/NXT2/five_minute_bot/index.html.)
• LEGO MINDSTORMS Education NXT Software 2.1
• computer, loaded with NXT 2.1 software