Now that the lesson has started, you need to adjust the position of the tablet (height and angle) until the colored shapes on the Mat appear inside their matching silhouettes on the tablet image. Once all the shapes are shown inside their silhouettes, clamp the tablet into its final position. The tablet grid is now calibrated and you can move on with the lesson.
In this first screen, we have a column on the left along with an image of the working mat in the center, and positional data on the far right. The data on the right displays information about where Sphero should be placed, along with formulas of how the intercepts are calculated. In this initial screen, Sphero should already be resting at the origin - which is a point A.
Going back to the gray column on the left - at the top displayed in bold, we have the equation of the path of the line that is displayed on the graph.
Directly below are three tabs: Prepare, Demonstrate, and Investigate.
The Prepare tab (which is the default mode that the lesson starts in), allows us to quickly familiarize ourselves with the lesson to see how it operates. By pushing on the vertical bars in the left column, we can adjust the characteristics of the linear path that Sphero will move along.
The bar on the left is used to adjust the slope of the line (e), and the bar on the right.
It is used to adjust the y-intercept of the line (b).
As we adjust the value of each slide-bar, we can see the path of the line change in the diagram.
Keep in mind that in this ''preparation'' mode, Sphero does not actually move.
This is just a virtual mode to illustrate how the lesson operates.
Additionally, there is an orange tab called ''GRAPH'' located to the immediate right of the gray column. You can drag or click this tab to display a graph of the path that you have chosen for Sphero to drive along.
You can switch back and forth between the two displays. Note how this linear relationship is nearly identical to what is shown on the mat. The starting location of where Sphero should be placed is listed on the right in bold.
Markers (shown in yellow and red) displays the location of the x and y intercepts along the path.
Once you are comfortable with how the lesson operates, we are ready to move onward with Sphero movement. To begin, click the ''demonstration'' tab. In demonstration mode, the screen appears almost identical to that of the ''prepare'' tab except that we now have the addition of a large green button in the lower right corner of the screen. This button initiates Sphero movement. Initially it appears green signifying that Sphero is ready to move. When pressed this button will turn red, and Sphero will move along the path chosen by the slide bars.
Sphero will move along the slope that you have entered, however if you change the intercept of the ball, you will need to physically re-position the ball prior to movement. The location as to where you need to place Sphero will update in the column on the right.
Again, in the demonstration mode, you can pull out the ''GRAPH'' tab to display the linear path of Sphero.
Once Sphero has completed its movement, the button will turn green again and you may re-position the ball back on the mat and run again. This can be done as many times as you wish.
The next tab titled ''Investigate'' challenges the students to guide Sphero along the proper path.
The target intercepts are listed on the right.
The slope and intercept values need to be adjusted to properly to synchronize the path of Sphero with the given intercepts.
When an answer is determined, adjust the entry values...
Move Sphero to the proper starting position and press the green play button.
Sphero will move, and observe to see if the ball moves along the intended path. For more intercept values, hit the ''shuffle'' button to continue with different scenarios. You may repeat this investigation as many times as you wish.
When you are done with the lesson, press the blue back button in the upper right corner of the screen. This will return you to the lessons selection menu.
Go through Sphero with the students, explore the linear equation components, analyze the graphs and let students to explore the equation through the robot. Do not forget to respond their questions, and ask more to guide their curiosity.