Examples of the bar method, mostly for secondary level here. Makes use of the excellent Thinking Blocks Modelling Tool. (I’m not keen on the individual tools or the individual Apps since they only focus on a single problem-type.) Some of the materials have been adapted from CPD course run by the NCETM. Files below contains further links to many problems and other resources.
Bar Method pdf file – updated May 2017
Bar Method flipchart file – updated May 2017
Another excellent resources is found here on the TES website which means that you may need to login/register to download it.