haversian spaces-spaces in bone formed by the enlargement of haversian canals. haversian system-a central canal containing capillaries and the concentric osseous lamellae around it occurring in compact bone.
Any donation to a political party, campaign, or action committee is non-deductible. Other non-deductible contributions are those to individual people, labor unions, business associations, for-profit schools, for-profit hospitals, foreign governments, and fees paid to associations or state or municipal governments.
Your local school is likely nonprofit and a branch of the local government. If so, yes, the donation is tax-deductible. See also IRS Pub 17, which has some duplication from Pub 526: Organizations That Qualify To Receive Deductible Contributions.