Dreams about school often symbolize learning, personal growth, or challenges you're facing in your waking life. In your dream, the setting of a school combined with the giveaway of free supplies and food suggests an opportunity or a chance for growth that is being presented to you. However, the appearance of rats and your reaction of fear and disgust indicate underlying concerns or anxieties about accepting these opportunities.

Rats can symbolize feelings of betrayal, fear, or something that feels unclean or undesirable. They might represent worries about the quality or integrity of what is being offered to you, or perhaps feelings of unworthiness regarding the help or support being provided. Your instinct to run away and scream suggests a strong emotional response to this situation, indicating that you may feel overwhelmed or unsure about accepting help or new opportunities in your life.

Grabbing a school item and dashing out might reflect a desire to take what you can from the situation while avoiding what you perceive as negative. It could also signify a need to protect yourself from potential harm or disappointment.

Overall, this dream may be encouraging you to reflect on the opportunities that are available to you and to consider what fears or apprehensions might be holding you back from fully embracing them. It could be beneficial to explore these feelings further, perhaps by identifying what specific opportunities you are facing in your life and how you truly feel about them.