1. Sharing Healthy Abundance
Learning to share, is a really tough concept if there's not enough to go around.
A feeling of abundance comes from our basic needs being met
& balancing that with an understanding of how ones needs may impact others around them.
Abundance starts with kids with food because it's such a basic survival thing.
As we grow we understand abundance in all of life means knowing things will be OK, no matter what happens,
and that you know you can make the best of what ever happens.
Unfortunately, a sense of lack may be further emphasized by the constant financial struggle,
forcing teachers (& parents) to do snack rationing, & sometimes with the least expensive snacks available.
Unhealthy snacks have been shown to create health & behavior problems. It's a lot harder to deal with kids who are eating foods that get their their natural energy flow thrown off by it and perhaps, due to lack of real nutrition,
leave them still feeling hungry. Kids need to feel abundant in the safe place that school becomes for them,
and using the valuable time spent at school, to learn L.I.F.E. skills that will empower them for the rest of their lives.
 Further establishing an already great routine with 1) inexpensive baking projects that could become part of a "whole snack experience" that the the class can co-create & 2) More bulk buying of ingredients & healthy snack choices.  A special treat would also incorporate many opportunities for learning measurements, as well as learning other cooking skills. Many kids love to bake & there are ways to incorperate it into learning a variety of aspects in math, science, & nutrition, let alone a more whole approach to the snack experience.
As an example: If organic carrot pieces & nutritonally seasoned popcorn (for instance) are left out continuously, for the kids to eat as they feel it, as well as a special treat that's made with who ever wants to help make it.
A possible special treat: sprouted grain bread that they sprout & grind themselves,
& then add a fillings of their choice; nuts, raisins, jelly... etc.This can even further create a feeling of abundance, and making them feel more safe about this issue, as well as feeling more self-reliant, from helping to make it.
 

2. Empowering Safety Awareness
    If we go back far enough, we are all tribal people.
It seems that living in today's world as little nuclear families has isolated us all to some degree, especially single parents. In tribal communities, interdependence skills happened naturally when kids were looked after by people they already trusted, because they had known them all their lives. They were brought together with other kids they also had known all their life's, to learn the ways of their people, together, because it was best for everyone.  It wasn't that long ago & perhaps in small towns still, if both parents need to work, perhaps a close friend of the family, or a Grandparent, &/or other relatives look after the children.  However, today's kids are forced to learn these life skills, & especially socialization skills, simotainously, with dealing with the necessary circumstances of spending all day (or most of the day, as the case may be) away from their parents, and this gets even more so, when there's been separated &/or divorced parents.  No matter how lovingly it's done, these circumstances do create "abandonment issues" that need to be consciously addressed, in order to help the kids heal themselves of this feeling and not be too eager for the wrong kind of attention.  For most of us trust issues are complicated, but especially for today's child, and especially regarding strangers. They need to be aware of their own safety at a much younger age than ever, and it's important that this be taught in an empowering way. That way it doesn't leave an over hanging fear, that everyone around them, could be a stranger that could hurt them.  Instead, they are being guided to trust their own instincts about this, as well as being taught to be aware of, & continually valuing their own intuitions about all issues in their lives. This skill is something that's somewhat instinctual however, honoring it in our society today, is not always the norm, so for people of all ages,
as well as children, it needs to be a learned (or re-learned) thing.

3. Communication & Negotiation Skills
A feeling of well being & safety, comes through being given many creative choices & gaining more abilities to do things for themselves while being supported, if need be. Through consciously dealing with tough issues, ones that they (we) have no real control over, we are meeting deeper needs of instilling interdependent communication skills, allowing kids to negotiate for their needs, in all interactions, for the rest of their lives. Communication has a real value and through empowering the kids to say what they feel & communicate to another kid themselves when there is conflict, allows the child to feel the power of consciously communicating.  As we allow the children to engage with teachers & parents, in the process of negotiating, when it concerns them, if there are changes needing to be considered. This sense that those in charge are really out for their best interest, is something that continually creates an atmosphere of good flow around a child.  Incorporating the children's comments into the activity, makes it personal to them. Being flexible to their reasoning and modeling thinking things through teaches them to do the same.  Monitoring our own feelings continually learning to express them in a more constructive way, we see the kids start to do the same among their peers, seeing them taking turns and making compromises to accommodate others needs besides their own.  By allowing them to be part of the process, through negotiations (&/or re-negotiations as the case may be) until everyone feels like a good descion was made, or at least understands why it was made.
As we are reasonable, they learn to be reasonable.

4. Trust Through Interdependence
For a healthy interdependent view of life, a child needs to be empowered with three important trust concepts: a feeling of "being safe", a feeling of "being abundant" and a feeling of "being self-confident of the unique creative efforts they have to offer this world".  Interdependence happens naturally as we take care of these three aspect of trust. Trust grows naturally with this interdependent approach of cooperative disciplining. As a child begins to trust this inside themselves, they get a feeling that it will all work out & are guided to somehow to make the best of what ever happens. Then, we can start to see the child being aware of the interdependent balance of both contributing to the group & appropriate self-expression, in a way they feel comfortable.  If we are taught at such a young age, to both take care of our needs
& the needs of our friends in an interdependent way...
these life skills can dramatically alter the child's whole life for the better, as well as, whole families. Interdependence is balancing their own needs with the needs of their classmates & teachers, they will then take these skills into family life & social situations in the future.
Trust activities: Simply taking turns fairly... showing (& explaining as it happens so they understand) that it's more fun to include rather than exclude everyone. How to speaking up when you feel something, saying it in an appropriate way because you care about the other person(s) involved in conflicts as they come up.
When some trust has built up, then falling backwards into the hands of the adults with the other kids
catching them as they fall.  Make sure they are safe & this is a big trust builder.