A handout for students guides them through the simple steps to set up and explore reflections on their handhelds, starting with a blank page of a TI-Nspire document. Dragging the object or the mirror line around the screen gives immediate visual feedback ... and is also fun!
A TI-Nspire document entitled Reflecter.tns can be used in the second half of the activity. This provides various polygons from which tessellation patterns can be created using only reflection.
The activity forms part of the OxBox, published by Oxford University Press to support their course 'Oxford GCSE Maths for Edexcel/OCR'. http://www.oup.com/oxed/secondary/2010gcse/