Jingle Bells
The chorus everyone knows. It's mostly one repeated note, which sounds easy and isn't — repeated notes expose every wobble in the bow and every lazy finger.
"Jingle bells, jingle bells"
How to play it
Six repeated F♯'s — high 2 on the D string. Keep the 2nd finger planted and just move the bow: identical short strokes, no accent, no bump on each new stroke.
"Jingle all the way"
How to play it
High 2, then a skip up to the open A, then home — open D, 1st finger, high 2. Cross to the A string and back with the whole arm. The last F♯ is a whole note: one long, even bow.
"Oh what fun it is to ride…"
How to play it
Repeated 3rd fingers, then repeated high 2's — all on the D string. Keep each finger planted through its repeats; move only the bow. Even strokes, middle of the bow.
"…in a one-horse open sleigh"
How to play it
Walking down on the D string — high 2, 1, 1, high 2, 1 — then a leap up to the open A for 'sleigh', held two counts. Keep the fingers behind each note down so the walk is lifting, not re-placing.
The one thing this tune is for
Repeated notes with a still left hand. The finger stays down; only the bow moves. If the pitch wavers on the repeats, you're squeezing and releasing — let the finger rest.
The usual mistake
The pitch drifting on the repeated notes because the finger is re-pressing each time — set it once and leave it, moving only the bow. And a bump at each bow change on the repeats: keep every stroke the same length and weight.