The 'Educator Vehicle' or 'Driving Base' model is the official Lego standard model for the 'robot educator' exercises included in the educational version of the EV3 software. The building instructions for the education version of the Education Vehicle can be viewed or downloaded HERE (thank you, Laurens Valk!). The education and home (retail) versions are somewhat different so the educator vehicle cannot be made with the home version of the EV3 kit without some modifications and compromises. However, as you can see in these images below, the home version of the Educator vehicle, at right, looks quite similar to the education version at the left, except for the rear wheel assembly, the diameter of the driving wheels and the color of some bricks.
This page shows you how to build an 'education vehicle' with the home (retail) edition of the EV3 kit. Even if you follow these instructions there will be significant differences between the home version made with the home kit and the version made with the education kit:
Here, then, is the build sequence for making a home version of the Educator Vehicle. In these instructions the output drive is confusingly shown separated from the body of the motors. Also, the instructions appear to show that 4 cables are needed when in fact only two are required for the basic vehicle.
There is a slight asymmetry in the pair of axle pieces that connect the two motors - this is not an error. If the asymmetry bothers you then you can use two 6-length axles instead of one 6 and one 5, but the axles will then protrude slightly from the body of the robot. Or use two 5-length axles joined like this:
Attach cables from motor port B to the left motor and from motor port C to the right motor.
Here below is a PDF version of the above instructions but I recommend that you work from the above instructions since the PDF does not include the embedded comments. Click the Pop Out button in the top right corner - you will then have the possibility of downloading the PDF if you wish.
If you have the Lego Digital Designer (free software for Windows and MacOS, downloadable HERE) then you can download my building plans for the home (retail) version of the Educator Vehicle via the link at the bottom of THIS PAGE but be aware that the order of assembly is different and less practical than that given in the instructions on this page.