27 Jun 2017 --- Teenage pupils in high school can lose around 51 minutes’ worth of vital learning time a day because their concentration levels dip due to hunger. This is according to the results of a survey conducted in the UK by Kellogg’s. The survey results show that 82 percent of teachers in Britain have seen teens arriving at school hungry every day. And nearly four in 10 teachers believed one reason children in their class were hungry was due to their parents being unable to afford food for breakfast.