Hi Ace22704,
Answer - natural observation
I think this experimental method is a better option because its in a natural environment where the kids dont know whats happening unlike the suveys where you ask them questions which is probably a bad idea because they might feel scared and just change their minds.
I think the smallest but impactful act is to just support local farmer's markets.
If a Union member does not pay their Union dues, they will not be able to participate in collective bargaining with owners.