Parents pay in advance, often over the internet, at the Deanes School in Benfleet to avoid issues linked with children having cash.
The schools said the system also helped it promote healthy eating.
Children can no longer buy sweets or fizzy drinks and the risk of losing their money is reduced, it added.
In addition, parents can get a report showing what their child has bought.
That is a very odd way of handling things, I mean I can understand parents having an interest in what their kids do, but surveillance like that is taking it a bit far.
I also read some columns on the Escapist today that were quite interesting and I can only recommend them: