Fantastic masks, originally uploaded by supersonic_ibu.

An art/technology based display using embroidery techniques to fasten materials together.
She says:
We mounted these by cutting up and painting toilet roll tubes with black, blue and purple poster paints and dipping them. When they were dry we just stapled the tubes to the backing and hung the masks through. The children used straws for the handles. The border is just coloured cellophane in blue and purple. We made the moon with bits of tissue paper and ribbons, threads, glitter and PVA and left it to dry on cling film before peeling it off and cutting it out.

Hands on Numeracy (Webster and Duncan) belongs to the Teaching Assistant in year 2. She used it to make this charming Olly the Octopus Display.

Looking at Mondrian with 1st grade, originally uploaded by Bisse.

Mondrian is always popular for displays. This first grade one from the US points out the connection to maths.
This one from our year 6 class is based on paintings rather than paper construction.