Introduction

Remind students that multiples are numbers that are the product of one whole number and another whole number. For example, 3 x 4 = 12. Twelve is a multiple of 3. Twelve is also a multiple of 4. Have students say the multiples of 3 in order. They would say 3, 6, 9, 12, 15, 18 and so on. Discuss how this sounds like skip counting. Get students excited to practice naming multiples of numbers that their Ozobot will choose randomly. Tell students that when it is time to check their work, they will be using a variable in the program. Explain that a variable is a value that can change depending on the information in the program.

Spin and Say a Random Number

Students will start by programming their bot to spin and say a random number between 2 and 12. Instruct students to go to Ozobot Blockly Level 3, and drag a spin block from the Movement category to the workspace. Then, go to Level 4 and drag a say number block below the spin block. Next, direct students to delete the green 1 block attached to the say number block. Students will go to the Math category and drag a random integer from block and attach it to the say number block. Tell students that since they'll be working with multiples of numbers 2 through 12, they will change the number 1 to 2, and the number 100 to 12.

Wait and Loop

Inform students that the next part of the program will tell their bot to wait for 15 seconds and then repeat the program 10 times. Have them find the "wait" block needed in Level 4 by clicking on the Timing category and dragging the "wait 1.0 seconds" block to the workspace. Instruct students to change the 1 to a 15 and add the block under the "say number" block. Now, students will go to the Loops category to program their bot to repeat the sequence 10 times. Ask students to drag the "repeat 10 times do" block to the workspace and add it to the program around the three blocks already there.