For today's exercise, you can play your D Major or D Minor scale in 1 octave, 2 octaves, or 3 octaves. You can also play any scale, arpeggio, or thirds exercise in either key of D (Major or minor) and/or their relative keys. Play whatever your teacher has assigned in your String-O booklet and/or check out this exercise option from one of our sponsors...
C. Harvey Publications has graciously offered to sponsor today's exercise. This snapshot comes out of the book Playing in Keys for Violin, Book 1. This book is filled with a wonderful assortment of exercises and songs in the keys of C, G, and D major. I highly recommend it for students playing in those keys. Check it out here.
Another great book that contains a wealth of resources is C. Harvey's "The Two Octaves Book for Violin" which contains all the Major and minor scales (where you can find some fun D minor exercises).