Take notes, then immediately practice on a free load board (like Truckstop.com’s free trial) to apply what you learned.
Vale la pena. No cuesta nada y aprendes lo básico. (Worth it. It costs nothing and you learn the basics.)
Rating: ★★★★☆ (4/5)
I recently completed the "Curso de Dispatcher en Español Gratis" (Free Dispatcher Course in Spanish), and overall, I am pleasantly surprised by the value offered for the price (free!).