One in three primary school children are snacking on junk food on the way to school or on the way home.
A study has found that lots of you are using money your parents give you to munch on things like crisps, chocolate and fizzy drinks without them knowing.
The food schoolchildren eat has been in the news a lot recently because of the number of kids who are overweight.
When the new term starts in September all schools will have to serve up healthier meals at lunch times.
There will have to be at least two portions of fruit or veg in each meal, and chocolates, crisps and fizzy drinks will be banned.
The goverment is spending £220m to try and improve school meals, including updating school kitchens and buying more fresh ingredients.
It's thought there about two million overweight children in the UK. Another 700,000 are obese, which means their weight could lead to serious health problems like heart disease and diabetes.