This is an outstanding resource – there are so many excellent activities here for the secondary classroom.
Start by reading Improving Learning in Mathematics – Malcolm Swan. The following links give you access to the resources, also some IWB resources.
The resources are hosted by Nottingham University, including all the pdf files very clearly indexed. Note that this site includes the complete set of resources including the software; however, this software no longer works on modern browsers and mobile devices, but see note below for HTML5 versions.

Tom Button has rewritten the Traffic Simulations in GeoGebra for A5: Interpreting Distance-Time Graphs with a Computer.

See also this post on Wisweb Applets HTML5 which has applets and lessons using the programs referred to in the Standards Unit. These wonderful applets were created by Utrecht University, they have built the learning environment Numworx around these.
The Professional Development resources are excellent. Look at PD1 ‘Getting Started’ for example, note PD1.4 on page 9 – 8 Principles for Effective Teaching.
IWB Materials This website has come about as a result of the NCETM research project: Enabling enhanced mathematics teaching with some interactive whiteboards (September 2006- September 2008) and was supported by the IWB research team at Keele University and the Spire Maths team.
PowerPoint Files
MMT has written a set of PowerPoint files for almost all of these excellent resources, he has made them – in his own words ‘classroom ready’. MMT has provided the resources in an editable format so that they can be tweaked to your own requirements. Thank you MMT! These files are available directly from Dropbox; note they are also hosted on Craig Barton’s site.

Standards Unit A1:Expressions – MMT PowerPoint

I have used activity S4 many times and created a PowerPoint including all the solutions.
A set of Desmos Classroom Activities by Ben Sparks features some of the Standards Unit Tasks. See also this #TMMathsIcons collection of Desmos Classroom Activities by Kathryn Darwin which features several Standards Unit activities.
Alternatively:
All materials – hosted by National STEM Centre. Including:
Mostly Algebra Mostly Number Mostly Statistics Mostly Shape and Space Mostly Calculus Others