If you already consider solfege essential, then the importance of singing goes without saying. Another basic concept is that rhythm is movement. This means that the practice of having a student stand in her footprints may actually be harmful. Seeing the shortcomings of notation probably sounds too radical but these do tend to limit musical expression. Edwin Gordon says that we bring meaning to notation as opposed to taking meaning from it. 
    If you want to know more:
    The first step is to read Parts 1 and two of Eric Bluestein's The Ways Children Learn Music. 
    The second, purchase GIA's software, Audiation Assistant, which  will prove invaluable.  
    I am happy to offer traditional tunes that will support using the whole string plus short pieces that I composed.            These SURE START materials will soon be available at the WHEN tab. I will also be offering a How-to, DVD that supports a Whole String view of violin technique. View selected segments at "nowfretless" - my YouTube Channel.        

Yes, I do teach individuals and classes! I will be posting more information soon for studios here in Easton, Pennsylvania, and in Whitehouse Station, New Jersey. Reach me through my Contact Page.