Plaster shells

While the 5th graders have been working on observational drawings of shells, the spec. needs 4/5 class has also been exploring shells, but in all mediums.  Most recently, they created plaster molds of shells.  First, the smoothed a layer of clay into a round container.  Second, we pressed small shells into the clay’s surface, creating negative imprints.  Lastly, we mixed up a batch of plaster and poured it on top of the shell.  About an hour later, the plaster pops off, leaving positive casts of the shells!