Sang to glory glory Hallelujah:

mine eyes have seen the glory of the downfall of the school
We have (missing word) all the teachers and we've broken every rule
We broke in to the office and we tickled the principle

Our truth is marching on

Glory glory how peculiar
teacher hit me with a ruler
'cause i bopped her on the bean
with a rotten tangerine

our truth is marching on
--

We three kings of orient are
trying to smoke a rubber cigar
it was loaded it expoded
now we're on yonder star
--

My mum told me this one, so must have been around late 60's early 70's:

Hot snot and goobie pie
all mixed up with a dead man's eye
mix it thick with an old man's stick
and drink it quick with a cup of sick
---

this one was popular late 80's early 90's:

i'm going to the loo loo loo
you can come too too too
i'm gonna do a poo poo poo
how about you?