Use the instructional video to guide your students through the Introduction to Color Codes activity. Alternatively, continue with the direct instructions below.

Explain: This is Ozobot. Ozobot is a robot that fits on your tabletop or desk and follows lines, reads Color Codes, and runs programs you create with blocks. Show students that under Ozobot, towards the front, there is a row of sensors. These detect lines and allow Ozobot to follow them.

Explain to students that in order for Ozobot to successfully follow lines they draw, the line and color sensors should be calibrated. Since lighting conditions can change and vary, calibrating Ozobot before each use is recommended or if it is acting differently than you'd expect. Let's practice calibrating:

• Find Page 1
• Use the provided calibration dot, or draw a black dot slightly bigger than your bot.
• Place Ozobot on the dot, and press the power button for 5 seconds (until the top LED flashes white), then release.
• Ozobot will move outside the circle, stop, then blink green when calibrated.

If you don't have a calibration dot handy, you can always draw a black circle with your maker to calibrate it. Show students how to use a marker to draw and fill in a dot and how to calibrate the bot.

Tell students that they will learn how to draw lines Ozobot can follow. Ozobot is able to follow lines drawn with any marker, as long as it is drawn on white paper and is the correct size . Explain to students that the bot won't be able follow lines that are too thin, inconsistent, or too thick. Model how to use the side of the chisel tip to create the perfect thickness (about 1/4" wide).

Show students how to draw the first line segment on their activity sheet, then have them practice by completing the line segments on their activity sheet. When they are finished, have students place Ozobot at the Start and watch to see if their bot reaches the end. Point out the Color Code at the end of the line and explain that students will learn more about those in the next lesson.

Model how to draw a circle for Evo to follow on Page 2, then have students draw their own circle for Ozobot to follow.

Optional: Explain to students that they drew a representation of what programmers call a "loop." A loop is code that is carried out as many times as you tell it to. This circle written as code would say, “Repeat 'walk a circle' forever!”

Ozobot can follow corners and curves as well! Let your students know that when they draw corners and curves, they shouldn't be too sharp (Ozobot might read this as the end of a line or not be able to make the turn).

Ozobot can "see" colors through it's optical sensor. Show students how to use the red, blue, and green markers to draw a path for Ozobot.

Ask students, "What do you notice about Ozobot's LED lights when it travels on a colored line?"

Explain that Ozobot's LEDs change color to show the color of the line it is following.

Wrap up the lesson by reviewing what students have learned. After today's lesson, they should should be able to:

• Calibrate Ozobot
• Draw lines, curves, and corners for Ozobot to follow
• Draw colored lines for Ozobot to follow"