Mix the cooked ground beef with the pasta sauce and simmer a few minutes.
Add a cup of sauce to the bottom of the slow cooker. Then add three lasagna noodles.
Add a half of a cup of sauce on top of the noodles and then sprinkle with cheese.
Add the next layer of noodles and then sauce. Sprinkle with cheese.
Add the final layer of noodles and add the remaining sauce.
Save the extra cheese for at the end of cooking.
Cook on low 4-6 hours or on high 2-3 hours.
In the last 15 minutes of cooking remove the lid and shake off any moisture into the sink.
Sprinkle the lasagna with remaining cheese.
Replace lid and let cook until melted.