Fill Flash is a technique used by photographers to achieve brighten photographs particularly taken outside on sunny days in deep shadowed areas. When the background is lit it is easier to capture fill flash images as the flash will light up the foreground subject also.
Put your Camera on Program Mode (P)
Shoot photos without the flash
Click the flash button (lightning bolt icon) right above the on/off switch
Shoot the same photos with the flash
Post the with and without photos in Classroom