Instruction Guide: EV3 - Move until Touch

In this Lesson we have 2 Primary Instruction Resources::

  1. The 1st resource is a EV3 Trainer lesson on Move Until Touch
  2. The 2nd resource is Stemcentric's video discussing the Wait block and the Touch Sensor.

Resource 1:

Have students work through the following EV3 Trainer section:

Behaviors> Sensors > 3. Move Until Touch

The EV3 Trainer Teacher's Guide references this on pages 36-42.

Students should be able to answer all the review questions at the end of each step and end up with a solid command of each parameter in the Wait block that pertain to the Touch Sendor and have an understanding of how the touch sensor works.

The "Try It" sections below the review questions in Step 3 & 4 dig deeper into the Wait-for-Touch parameters and how to use the EV3 buttons as touch sensors.

The Optional Activities below the "Try It" in Step 3 has a "Did You Know" which shows the operation of the Touch Sensor.

The EV3 Trainer Teacher’s Guide has additional reproducibles for those who have purchased the product.  The reproducibles for Move Until Touch can be found on pages 97-98.


As students progress through, have them document their milestones in the Move Until Touch Task Assignment Sheet.

This Task Assignment has two teacher sign-offs, here's what to look for in each:

Arm Position Challenge

This page contains a copy of this challenge from the EV3 Trainer

  • Have the students explain their tribot hardware, and explore the different approaches to the touch sensor attachment design they considered
  • Have the students explain their program to ensure both team members understand the operation of the touch sensor block
    • Start with their flow chart/pseudocode to get an overall view of the program
    • Use the EV3-G program to show how each block was implemented

Recource 2:

Stemcentric has an excellent video discussing the Wait block and the Touch Sensor. This material is a Differentiated Instruction Material: Alternative. Following this video, there is an Exercise.