https://www.gov.uk/government/news/guidance-on-promoting-british-values-in-
You can download the booklet on how this can be done as part of the SMSC curriculum in schools.
https://www.gov.uk/government/uploads/system/uploads/attachment
_data/file/380595/SMSC_Guidance_Maintained_Schools.pdf
A range of mock elections activities can be found on this web link: http://www.hansardsociety.org.uk/education/mock-elections/
The parliament website has resources like videos; Parliament tour and downloadable Election kit to support this:
website: http://www.parliament.uk/education/
There is also ample information for learning about development of British law on the website.