This is what I spend my time writing now:
T conveys a life estate to A and has a reversion because there is a future interest left in the grantor (T) who transfers a vested estate of a lesser quantum (life estate) than that of the vested estate (fee simple absolute) which he has. A’s heirs now have a vested remainder subject to open because the future interest is vested in a class of persons, at least one of who is qualified to take possession, but the shares of the class members are not yet fixed because more persons can subsequently become members of the class.
Not so fun, but at least my teacher is a sarcastic MoFo who likes to make fun of kids who think they know it all. He's pretty hillarious.