# Teacher Notes: ProPreview

Today's lesson has no new material to teach the students. Instead, the students should revise and solidify their knowledge and you should focus on those students that are falling behind.

Try your best to teach them agency so that they do not fall behind again.

At the end of the lesson, direct all of the students to the last of the additional tasks.

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• #1621
• 20 Jun 2020
```# Create your objects here.
ev3 = EV3Brick()

right_touch = TouchSensor(Port.S2)
right_motor = Motor(Port.C)

# Write your program here.
ev3.speaker.beep()

while True:
if right_touch.pressed():
right_motor.run(1000)```

Example solution to the task "Program the robot to drive the right motor indefinitely in the opposite direction if the right touch sensor is NOT pressed.":

```# Create your objects here.
ev3 = EV3Brick()

right_touch = TouchSensor(Port.S2)
right_motor = Motor(Port.C)

# Write your program here.
ev3.speaker.beep()

while True:
if right_touch.pressed():
right_motor.run(1000)
else:
right_motor.run(-1000)```

Example solution to the task "Change your program so that the robot checks the left touch sensor and to drive the left motor.":

```# Create your objects here.
ev3 = EV3Brick()

left_touch = TouchSensor(Port.S1)
left_motor = Motor(Port.B)

# Write your program here.
ev3.speaker.beep()

while True:
if left_touch.pressed():
left_motor.run(1000)
else:
left_motor.run(-1000)```

Example solution to the task "Program your robot to dynamically check both sensors and drive their respective motors.":

```# Create your objects here.
ev3 = EV3Brick()

right_touch = TouchSensor(Port.S2)
left_touch = TouchSensor(Port.S1)

right_motor = Motor(Port.C)
left_motor = Motor(Port.B)

# Write your program here.
ev3.speaker.beep()

while True:

if right_touch.pressed():
right_motor.run(1000)
else:
right_motor.run(-1000)

if left_touch.pressed():
left_motor.run(1000)
else:
left_motor.run(-1000)```
```# Create your objects here.
ev3 = EV3Brick()

right_touch = TouchSensor(Port.S2)
left_touch = TouchSensor(Port.S1)

right_motor = Motor(Port.C)
left_motor = Motor(Port.B)

# Write your program here.
ev3.speaker.beep()

while True:

if right_touch.pressed():
right_motor.run(1000)
else:
right_motor.brake()

if left_touch.pressed():
left_motor.run(1000)
else:
left_motor.brake()```

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This Tutorial is used in the following courses and lessons

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