make evergreen tree landscapes with glue and pine needles.
Big white paper with glue poured on in shapes of trees and pine needles put on that to make trees...areas of white left for snow covered fields, perhaps a lihjt wash of blue watercolor for sky area.
Could use blue paper and paint white (acrylic or tempra) for snow
twig based mobiles with bits of wool or cotton as snow clouds hanging from them.
Using a small twig, find physical hanging center and tie a piece of embroidery thread for hanging, have students work in pairs, one hold thread and other ties on snow clouds and is helpful in the aesthetics of the mobile, then switch. Could sprinkle glitter on as well.
snow globes. Use oil based clay, like plasticine or certain modeling clay (works best with scupley/fimo clay that is baked in oven for a few minutes), make a winter sculpture (snowmen, pine tree, gingerbread house, etc) glue to the bottom of a baby food jar (use crazy glue, let dry), add glitter and water to the baby food jar, put adhesive on top where jar meets it, insert sculpture top and screw closed (glued tight).
Finger puppet gloves. Use scrap fabric, fabric glue (or sew em up) and gloves to decorate into holiday cheer.
Holiday napkin rings. Toilet paper/ paper towel cardboard tubes, sliced into rings, rolled into glue and rolled into glitter..voila
I am not sure of your age range but I am a NYS cert. art teacher and presently a waldorf K teacher and have loads of ideas and lessons. Hit me up, I love to share.
You could also check my archives, I may have more ideas hidden in there.
LittleLeaf School
http://www.littleleafhome.org/