I wrote this to add to Timings in a Salon by Carrie Bray (see link left) as I needed to encourage my higher level students in the same area.
I started the session by giving students terminology which they had to define, then work out how much it was worth if a=1p b=2p etc. (see PPT).
I used then used tasks to recap on 24 hour and analogue time next then used the attached worksheets alongside Carrie's worksheet.
I then provided a Tarsia puzzle at the end to recap on time.