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Mars Rover-Exploring Mars Geology
Lab 2 - Study your Martian Rock Sample

Teacher Portal

Materials Needed

The following is a list of all the materials that are needed to complete the VEX GO Lab. These materials include student facing materials as well as teacher facilitation materials. It is recommended that you assign two students to each VEX GO Kit.

In some Labs, links to teaching resources in a slideshow format have been included. These slides can help provide context and inspiration for your students. Teachers will be guided in how to implement the slides with suggestions throughout the lab. All slides are editable, and can be projected for students or used as a teacher resource. To edit the Google Slides, make a copy into your personal Drive and edit as needed.

Other editable documents have been included to assist in implementing the Labs in a small group format. Print the worksheets as is or copy and edit those documents to suit the needs of your classroom. Example Data Collection sheet setups have been included for certain experiments as well as the original blank copy. While they offer suggestions for setup, these documents are all editable to best suit your classroom and the needs of your students.

Materials Purpose Recommendation

Pre-built Code Base - Eye + Electromagnet

For demonstration purposes. 1 for demonstration


To build the Code Base - Eye + Electromagnet and use the Disks for Lab activities. 1 per group

Code Base Build Instructions (PDF) or Code Base Build Instructions (3D)

To build the Code Base. 1 per group

Code Base - Eye + Electromagnet Build Instructions

To add the Eye Sensor and Electromagnet to the Code Base. 1 per group

Tablet or Computer 

To access VEXcode GO. 1 per group

VEXcode GO

For students to build projects for the Code Base. 1 per group

Lab 2 Image Slideshow

Google Doc / .pptx / .pdf

For visual aids while teaching.

Robotics Roles & Routines

Google Doc / .docx / .pdf

Editable Google Doc for organizing group work and best practices for using the VEX GO Kit. 1 per group


For students to fill out the Robotics Roles & Routines checklist. 1 per group

VEX GO Field Tiles and Walls

To use as a testing area for the Code Base. 4 Tiles and 8 Walls per testing area

Pin Tool

To help remove pins or pry beams apart.

Dry erase marker (optional)

To mark the locations of the Disk and sorting area on the Field. 1 per group

White board eraser (optional)

To erase the marker on the Field at the end of the Lab. 1 per group


Begin the lab by engaging with the students.

  1. Hook

    In the last Lab, we used the Electromagnet on our Code Base. Our robot also has an Eye Sensor on it, too! How do you think we could use the Eye Sensor with the Electromagnet to make our Code Base do more things with a Disk?

  2. Leading Question

    How can we code the Code Base to make a decision based on the color detected by the Eye Sensor?

  3. Build Code Base - Eye + Electromagnet


Allow students to explore the concepts introduced.

Part 1

Students will build on what they learned from Lab 1, adding an [If then] block and a <Detects color> block, to use the Eye Sensor to report the color of the Disk collected by the Electromagnet to make a decision and drive it to the sorting area.

Mid-Play Break

Come together to check in on students' progress and talk about what the Code Base is doing in their projects. How does the Eye Sensor work in our project? What block(s) control the Eye Sensor? How did you make the Electromagnet work with the Eye Sensor in your project? Then, segue to Play Part 2 by asking, what if we change the location of the Disks or the sorting areas? Will this project still work? Why or Why not? What parameters would you change?

Part 2

Students will work in their groups to iterate on their projects from Play Part 1, to complete the challenge of collecting the Red Disk from a different location and delivering it to a different sorting area, using Eye Sensor data.


Allow students to discuss and display their learning.

A VEX GO character

Discussion Prompts