KS2 National Curriculum Science - How We See Things & Changing Circuits (6F& 6G) by CGP Books
This book contains a variety of question types covering everything 10-11 year old pupils need to know about light and electricity, following the National Curriculum for science. It's clearly laid out with a topic per page, written in a style that is easy to understand with plenty of space for writing answers. Pull-out answers are included and there's a poster on reflections and shadows for pupils to colour in.