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I use terracotta flower pots for my students to create their coil pots in. It gives structure to the sides as they are building upwards. I was having so many students not able to control the amount of pressure they were using. This would cause their pots to become more like plates. This prevents that!! Plus, it speeds up the drying process.
The students will build their pot up toward the top (depending on how much clay you provide them. You may have some students make "cookies" and stack them.
You can tape the bottom of the terracotta pot to keep this from happening, but if you catch it the next day...it is super easy to cut off with a clay tool!
POOF! GONE! ha ha This is also a great time to knock down any sharp edges the pot might have around the lip.
Carve the student's name into the bottom while the clay is still leather hard(next morning).
You could use a sharpened pencil, but I love this handy dandy nut picker thingie(I have no idea what it is actually called. I just know we used it to get the nut out of the shell growing up! ha ha).