Too many chickens / written by Paulette Bourgeois ; illustrated by Bill Slavin.

Enhanced descriptions from Syndetics:

When a farmer brings Mrs. Kerr's class a dozen eggs to incubate, the class project quickly goes awry. In no time at all, Mrs. Kerr's classroom has become a farmyard and the situation is spiraling out of control. It all starts when the farmer forgets to come back to get the newly hatched chicks. Before the class can say cluck, the chicks have turned into chickens and are roosting on the science table and chattering away all day long. When the farmer finally does return, the classroom is overrun with chickens. "These chickens look so happy," she says. "I can't bear to take them away. And here's a little present for all you've done." "Bunnies," says Mrs. Kerr. "How cute." From chicks to bunnies to an old nanny goat, Mrs. Kerr's class must take drastic measures to prevent total bedlam. Will their class ever be the same?