Katherine Donnelly: For many, the price of current dispute is too high
United we stand is a familiar catchcry in the union movement. It is a call to members to stick together, because that gives you the best chance of winning a battle.
The other side of that is, of course, divided we fall.
The ASTI annual conference ended yesterday with a union deeply split, probably even more so than it was at the start of the week. A recent meeting of its executive heard that almost 450 members had resigned in the first three months of the year, an unusual pattern in a teachers' union.