Teacher's Note: Solving the tasks for following a direction Pro Preview

Today students will have to construct a robot without building instructions. As always, this is a perfect moment to recall basic building concepts. From how to securely fasten a beam with two or more pins to how to use the angle changing parts. In order for the lesson to be successful, it is important that students have a plan for their robot within 10-15 minutes, so check them often during the construction and discuss their ideas. If they don't have a plan, you can offer them to use another robot as a basis of their new one or even a picture from the Internet. If they can't handle the free construction at all, tell them to build the robot from the previous lesson. The robot may not necessarily look like a yacht, but it would certainly help with the story :) After all, construction should not take more than an hour.

We start the programming with two simple tasks that will make the robot move, so that we could see if we have to repair the construction somehow.

Then the students will have to learn a new blok - a Switch for Gyroscope sensor. Respectively, the task for it would be to show a smile at less than 0 degrees and a heart at more. This task will help them succeed to make the robot follow a direction, which actually is their next task. Before the task, there is an explanation of the logic of the algorithm, which is exactly like the one for following a line, but here we're following 0 degrees. The program is the same with the one with the smile and the heart, but instead of these pictures there are turns in two opposite directions. Unlike following a line, the direction of each turn is important here. It should always be at 0 degrees, otherwise the program enters a vicious cycle.