Early Years Roamer Move and Turn Group
Programming EYR from Dave Catlin on Vimeo.
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.
Unlike the other Standard Roamers, the Early Years Roamer uses a counting paradigm.
Moves the Roamer forward one unit. 
Moves the Roamer backward one unit. 
Example Program
Moves Roamer forward 2 units.  
Moves the Roamer backward 3 units.  
Roamer moves forward 2 units and backward 3. 
Technical Note
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. Note: We’re not suggesting you use this term with young children.
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You will learn how to program Roamer to turn left and right.
Turns the Roamer Left one unit. 
Right Turn Instruction
Turns the Roamer Right one unit. 
Example
Turns Roamer left 3 units.  
Turns Roamer Right 2 units.  
Roamer turns left 3 and then right 2 units. 
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 quarter turns.
Moves Roamer Forward 3 default units (3 x 20cm = 60cm)  
Turns Roamer Left 2 default units (2 x 90 = 180 degrees)  
Moves Roamer Backward 2 default units (2 x 20cm = 40cm)  


Turns Roamer Right 3 default units (3x 90 = 270 degrees)  
Roamer moves Forward 3 units, turns left 2 units, moves backward 2 units and turns right 3 units. 
You’ll learn how to make Roamer stay still and silent.
Makes Roamer stay still and quiet for one second. 
Moves Roamer Forward 3 (3 x 20cm = 60cm).  
Makes Roamer stay still and silent for 2 seconds.  
Moves Roamer Backward for 3 ( 3 x 20cm = 60cm).  
Roamer moves Forward 3 units, Waits still and silent for 2 seconds then moves Backward 3 units. 
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