One of the main concerns for school uniform is the cost, and increasing the financial burden for low-income families. One way to compensate low-income families, could be the PTO/PTA subsidize the uniform for families that qualify for reduce or free meals, and school fees.  This will help the parents out tremulously with being able to afford to send their child to public or private school.

Once uniforms has been introduced, the PTO/PTA could buy back second-hand uniforms from parents and resell at a small profit, to build up the subsidies.  This would keep the cost for low for parents whether low-income or not.  The school could do a mini uniform sale at the beginning and end of every school year to give parents the choice to sell uniforms that their child outgrew and buy used uniforms that will fit the child for next year.