I’m sure you will have noticed that, during May half term, the 2019 KS2 SAT papers were released. Despite promising that I wasn’t going to do any detailed SAT analysis over half term, I simply couldn’t resist looking through to see what opportunities there were for bar modelling. Anyone who knows me, knows that I don’t just like bar modelling - I love it! I do however, recognise that the bar doesn’t work for everything. It’s not the magic bullet that some people propose, but when children have the opportunity to develop its use progressively over time, it certainly is powerful. The thought kept nagging at me; how many opportunities would this year’s papers have? Finally the lure became too much and I dove right in.
Bar modelling reminders
- there are always other ways of solving – I am demonstrating just one of the possibilities; you might look at my method and think it is just weird – strategy is very personal after all and dependant on the procedures, knowledge and experience a person has at their disposal
- it is not necessarily about efficiency – it’s about providing an entry point when you don’t know what to do immediately though we might argue that is efficient
- it doesn’t work for everything
- drawing of bars is not always required. As children gain experience in the use of simpler bar models they will internalise them.
Here is a brief summary of my favourite questions. Some are simple and some more complex.
Well I had great fun thinking about the approaches to solving these using bar modelling. How would you model the problems/thinking out?
STA, KS2 Mathematics SATs (2019)