A loop pedal is kind of like a musical treadmill, and a great exercise tool. It makes it more fun to practice and make musical exercise miles. The course Playing With Loops is based on the concept of learning to play jazz by exercising over loops. Loops, chords, notation, example solos and extensive videos with explanations are provided to get you playing and improvising over loops.
If you don't have a looper, you can use some other recording tool or software, or simply use the pre-recorded backing loops in this course.
This will get you to practice more, and learn faster.