Casio Graphical Calculators

All Casio manuals can be found on the Casio website here.
Video How-To Guides are also available from Casio

For older students (16+) MEI have created tasks using Casio Graphical Calculators as part of their excellent series of resources on Integrating Technology. Note that the series includes many  tasks for the excellent, free GeoGebra and Desmos.
(There are pages on this blog on GeoGebraWolframAlpha and Desmos.)

MEI Casio Tasks