The firm, one of the leading gas and electricity suppliers in the UK, took its Climate Cops Academy to Wroughton County Junior School.
Over 90 children aged nine to ten took part on the initiative, which aims to teach youngsters between the ages of seven and 11 how to be more efficient and save energy while both at school and in the home.
Mr Hawkes, headteacher at the school, said the Climate Cops Academy "taught the children about climate change and saving energy in a really fun, engaging way".
He added: "They've learnt some simple ways to conserve energy that will make a big difference to the school, their homes and the environment."
npower launched its Risk Navigator earlier this month, which helps businesses to save money on energy procurement and also monitor and manage their energy usage more efficiently.
Click here to run an energy price comparison, and see if you could be paying less for your gas and electricity.