I found a great resource on TpT - not mine - that teaches this chant well and is a great set-up for either introducing or practicing ta ti-ti. You can find it here.
Anyway, after I introduce the chant, I've always been at a loss as to what to do with it from there. I've been tweaking this movement plan for a couple of years, and I finally love what I have.
First, I tell the students that my music classroom has become "haunted." I have laminated pictures of ghosts with numbers, that have different rhythms on the botttom. Examples: