After practicing bow hold exercises which develop a familiarity for holding the bow, it's time to put the bow on a string.
You can start by holding the bow at the balance point or at the frog. If I decide to start at the balance point with a student, it's a very short term plan (one week to a few months) because you eventually have to adjust to the uneven weight distribution of longer bow strokes.
With the student below, I initially asked him to hold his bow at the balance point because his bow was too long for a beginner (20 inches works well for a 9 year old beginner) He spent a week playing ("Mississippi Hot Dog") between the star stickers I had placed at the balance point and just past the middle. This produced poor results at the following lesson - his right arm was high with lots of tension - so I asked him to play from frog to middle and just a staccato downbow and a staccato upbow.
With the left hand gently touching the bow, tension in the right arm dissipated. I like to ask students to use two-handed bowing and then try with only the right hand. Going back and forth between the two helps to train the right arm to relax. The bonus is that keeping the bow perpendicular to the string becomes more obvious!
Next we worked on noticing the right elbow, especially on the upbows when it needs to drop down to go towards the cello.
I like to start with D string since G takes more coaxing to get a resonant tone and the other strings might be at awkward angles.