A child plays Turtle when they imagine themselves to be the robot. When they move and turn like the robot they think about what they’ve got to do to make the robot to achieve a task. Playing Turtle makes the Roamer an object to think with and connects students to powerful mathematical ideas.
The analogy of nose and tail reinforces the idea of direction. You can stress this more by using Transfers making Roamer Characters. When students do this they increase their empathetic bond with the robot.
Roamer helps children understand angles in two ways:
You’ll learn how to program the Roamer to move forward and backward.
|Number||[1 to 100]||Moves the Roamer forward Number of units.|
|Number||[1 to 100]||Moves the Roamer backward Number of units.|
|Moves Roamer forward 5 units.|
|Moves the Roamer backward 3 units.|
|Roamer moves forward 5 units and backward 3.|
The correct technical phrase for moving forward and backward is linear movement. We use the term ‘move’ as a general term to describe the Roamer moving forward or backward. You’ll become familiar with the phrase move and turn, which we use to describe Roamer’s linear and turning movements.
Fd 5 Bk 3 GO
You will learn how to program Roamer to turn left and right.
|Number||[1 to 999]||Turns the Roamer Left Number of units.|
|Number||[1 to 999]||Turns the Roamer Right Number of units.|
|Turns Roamer left 60 units.|
|Turns Roamer Right 30 units.|
|Roamer turns left 60 and then right 30 units.|
Lt 60 Rt 30
You’ll learn about defaults and units of movement and turn.
A default is a setting or value automatically assigned to an application. This implies that you can give the unit a different value.
The default unit for forward and backward is 20 cm. It’s the same length as the Roamer body. We chose this unit to make the robot a yardstick to help students develop their estimation skills.
The default unit for turning is one degree.
|Moves Roamer Forward 3 default units (3 x 20cm = 60cm)|
|Moves Roamer Backward 12 default units (12 x 20cm = 240cm)|
|Turns Roamer Right 30 degrees.|
|Roamer moves Forward 60cm Backward 240cm and Right 30 degrees.|
You’ll learn how to make Roamer stay still and silent.
|Number||[1 to 100]||Makes Roamer stay still and quiet for Number of seconds.|
|Moves Roamer Forward 3 (3 x 20cm = 60cm).|
|Makes Roamer stay still and silent for 5 seconds.|
|Moves Roamer Backward for 3 ( 3 x 20cm = 60cm).|
|Roamer moves Forward 60cm, Waits still and silent for 5 seconds then moves Backward 60cm.|
Fd 3 W 5 Bk 3