# Sample Lessons

## Go Blue-Bot Go!

### Overview

Students will determine the distance of 1 unit of Blue-Bot. This will be helpful when using Blue-Bot and for solving future challenges.

### Concepts

- Estimation
- Distance
- Measurement

### Materials Needed

- Blue-Bot
- String or other resource for measuring such as yarn or ribbon
- Marker
- Scissors

### Activity

Place Blue-Bot on the floor. Have a student place one end of string next to the front of Blue-Bot. Another student presses the Forward arrow button once and then presses **Go**. Blue-Bot will move forward one unit. Mark the string where the front of Blue-Bot stopped. Cut the string where marked. This represents the distance of one unit of Blue-Bot.

### Extension

- Have students create a name for the unit of measurement.
- Compare the string to a ruler and see how many inches/centimeters one unit of Blue-Bot represents.
- Estimate how many units it will take to move Blue-Bot to a designated location in the classroom. Try the program with the robot and see if you were correct, or if you underestimated or overestimated the distance.

## Getting to Know You

### Overview

Students will apply units of measurement to move the Blue-Bot to another location.

### Concepts

- Estimation
- Distance
- Measurement
- Direction

### Materials Needed

- Blue-Bot

### Activity

Have the students sit in a circle. One student begins by choosing another student sitting across the circle and then estimates how many units it will take Blue-Bot to reach the selected student. The student who goes first will estimate, test, and adjust if necessary. Once Blue-Bot reaches the other student, have that student answer a question before selecting yet another student to program Blue-Bot to reach. The teacher can ask a question that is general, such as what is their favorite animal, movie or book. Or you can incorporate questions from current units of study.

### Extension

- Addition problems: Write each student’s initial estimate on a chalkboard, dry erase board, or somewhere that all can see. For example if a student estimates “forward 5”, write 5. If the estimate is too short, put a plus sign next to the 5, creating an addition problem where you can add the additional units needed to reach the desired location. Place Blue-Bot where it began, enter the additional units and select
**Go**. (Blue-Bot remembers the previous entry.) Or, clear Blue-Bot’s memory by selecting the Clear (**X**) key, and then enter the new estimated total. - Apply the same concept for subtraction. If Blue-Bot goes too far, students can use the back button to take away steps. Make sure you place Blue-Bot back where it started.

*Don’t forget that Blue-Bot holds all previous commands entered. Unless the Clear ( X) key is pressed, Blue-Bot will include its previous commands, adding any new ones that you enter onto the end of the whole program. You can delete previous commands to start over with a fresh command sequence by selecting the Clear button (X).*