@Debbie Kora, the toe taps simply get the tibialis anterior to fire to dorsiflex the foot/ankle which is the opposite of what a supinated foot does. Additionally, you might consider some soleus and gastrocnemius stretches as I am going to guess that your calves are probably restricted in length. Some isolated strengthening of your peroneals would help the overly lengthened lateral ankle joint musculature that comes with a supinated foot as well. Hope that helps.... Feel free to PM off of my website if you need additional info!
Julia R - thank you so much! I would LOVE to offer you a tutorial regarding the knees - I will definitely keep your request in mind when I next return to film for PA. ...p.s. if you find my You Tube channel - I have other health hints posted as well