An online game to select lengths from a ruler. Unfortunately it is an Imperial ruler, but students (if you set it to quarters) can still practice using a linear scale.

SunSmart Millionaire has a fun quiz and lots of information about the sun and sunscreens, but best of all go to The Lab to learn more about investigations and to see some excellent examples using beads that change colour in ultraviolet light.

Macrobiotica Science @the lakes is an excellent resource if planning a field excursion to conduct investigations into a freshwater environment.

Four experiments on bitou bush seeds or seedlings are described in detail, along with an explanation of the variables in Weeds Attack! – follow the “Teachers” link.