How do you motivate your students to practice?

[ProfBelemdeRuiz]

I use duolingo as an extra points activiy but It´s losing effect in my students :(
What do you do to inspire them to practice?

[Brigette929548]

I have a giant racetrack on a bulletin board in the hallway. Each kid has a car and that car is moved weekly on the track. I even have kids that are not in my class doing Duolingo and racing on the track. I also put a circle up on the wall of my classroom for each circle completed on their trees..