boxes — an evergreen shrub or small tree of the genus Buxus, especially B. sempervirens, having shiny, elliptic, dark-green leaves, used for ornamental borders, hedges, etc., and yielding a hard, durable wood.
materials — the substance or substances of which a thing is made or composed: Stone is a durable material.
assemblies — an assembling or coming together of a number of persons, usually for a particular purpose: The principal will speak to all the students at Friday's assembly.