Demo the entry, maintenance and the exit. Point out in maintenance the desired AoB for normal turn / attitude.
1.Teach- entry. Good pre turn lookout, look straight ahead then commence roll to desired AoB, neutralise controls (not always centralise). Return to wings level and let them have a go.
2.Teach- maintenance. Good lookout esp' in direction of turn, Check attitude, adjust as necessary, check instruments(airspeed etc). Let them have a go.
3.Teach- exit onto a specific heading reference. Lookout, then look straight ahead roll to wings level, anticipate roll out onto feature, lookout when wings are level esp' blind side. Let them have a go at all three obviously starting from wings level.
4.If it happens naturally during the above teach recovery from spiral descent if not I would induce it at this stage.