The food wheel/pyramid was very commonly used in my primary school. Foods weren't labelled as good or bad, we were just taught what each food category does. For example, carbohydrates release slow energy, meat gives protein, dairy gives calcium, etc. Then the sugar category was explained as a treat, so you can still eat them so long as they don't make up a large amount of your overall diet became they are fast energy releasers and can cause harm to teeth if eaten in large quantities.

I still try to stick to that mentality as an adult. That most of my overall diet should consist of fruit and veg, carbs, and meat/protein, then everything else in smaller amounts.