Any suggestions on the best exercises for a bad knee?

To be more specific Grade I MCL Tear.

Thanks so much!

Glad you know what it is. Did you get Pt? If not, I highly recommended it.

I agree with Heike, PT it

PT is great; also look into MAT (Muscle Activation Techniques; www.muscleactivation.com)- A MAT Specialist will narrow exactly where your weaknesses lie at this point after the tear. Then you can focus on keeping things strong with Z-health (www.zhealth.net).
My son had this injury from football and was back on the field in 2 weeks after MAT work and Z-health programming to ensure it wouldn't get worse. He still does the routines (including plyometrics) to maintain knee strength and stability. He has never had a problem since and it's been 7 years.

My favorite for knee weakness and injury to get back in business is:

Sitting with your feet flat on the floor weight equal in the feet, small soffee ball between the knees.

Squeeze the ball equally and bring your weight forward over the middle of the feet to stand all the way up, squeeze the ball at the top and then continue as you bring weight back over the heels to slowly lower yourself back down.

Repeat for 10-20 repetitions. Helps with proper ankle, knee, hip alignment and works all aspects of the quads and hamstrings to support the knee joint.