(ˈflænəlˌbɔːd) or flannelgraph (ˈflænəlˌɡrɑːf, -ˌɡræf)
noun
a visual aid used in teaching consisting of a board covered with flannel to which pictures, diagrams, etc will stick when pressed on
flannelboard in American English
(ˈflænlˌbɔrd, -ˌbourd)
noun
a flannel-covered surface to which other flannel pieces, as letters of the alphabet, numbers, etc., adhere merely by contact, used mainly in schools as a visual aid