FIRST Financial System Problems

[runneals]

We have our own bank account at a local bank and we issue debit cards (currently 3) to adult coaches to purchase items we need. This works pretty well. Since we are a 4-H group, I would like to have a check book where the student CFO writes checks to reimburse mentors for items they have bought (who present their bills at team meetings) and require an adult mentor/coach to also sign the check if over a certain amount (~$100) and have 1 debit card to make online purchases. This way, the adults can't spend money inappropriately (which we have had once this season already), the students learn how to manage their money, and robot parts can get ordered quickly.
Any thoughts as to if this would work? Any other ideas of how to deal with this type of issue?
Hope your issues get resolved soon,
David