Year 4 have been learning about the digestive system with Mrs Sly – what happens to the food we eat as it passes through the body. With a classroom full of boys, this turned in to a fun session as the whole process was demonstrated with a banana and chocolate spread sandwich!
The boys began by making their sandwich and cutting it in to small pieces, which represented the canine and incisor teeth cutting up the food in our mouth, and then squashing it all together with a potato masher which represented the molars grinding the food up further. A bit of soapy water was added in to represent saliva.
The mixture was then put in to a plastic bag which represented the stomach. To this some vinegar (stomach acid) was added and the contents were all mixed together.
It was then tipped in to a pop-sock which represented the intestines. The liquid was squeezed out (this goes to the kidney) and a solid mixture is left which was then pushed out through a hole cut in to the bottom of the pop-sock, representing the faeces.
Throughout the session there was lots of excitement, squeals and laughter. Benny said: “I’m not sure I’m going to eat my lunch now.”
Mrs Sly, Head of Junior School, said: “the boys have loved this lesson and getting so messy, but whilst it’s fun, it also has a serious side. What we’ve done has brought the whole process to life and ensured that the boys really understand what happens during the digestive process. It’s much more effective than standing at the front of the class and describing the process.”
After the practical the boys recorded each element of the procedure in a flow chart to capture the whole digestive process.
Iósaif said he enjoyed making the sandwich the best, whilst Anish said: “I enjoyed pushing the liquid out of the pop-sock the best. It was quite gooey.”