What do you expect from children this age in tap class? and what do you teach?

This is what is on our syllabus for this exact age:

brush
stomp
stamp
ball change
flap
shuffle
shuffle hop step
shuffle ball change
flap ball change
pivot
walking flaps
single buffalo
toe heel turns
buffalo turns
cramp roll

If they master that then:
single time step
split riff

It really depends. There is a big difference between a 9 year old and a 7 year old. My beginning 7 year olds master by the end of the year:

brush
scuff
touch
toe
(all the above include hops; i.e. brush hop, scuff hop)
shuffle
shuffle ball change
ball heel
flap
flap heel
chug
maybe flap ball change

BUT the 9 year olds add the following:

flap ball change
flap heel toe heel
flap heel toe hop
flap heel heel (alternating heels)
buffalo (single)
maxi fords
cincinnati
cramp rolls
paradiddles
4 count riffs
flap heel turns
and some begin pullbacks at that age

Flaps
Shuffles
Shuffle Hop Step
Shuffle Ball Change
Cramp rolls
Heel Stands
Maxi Ford
Buffalo
Single and Double Front Essences
Military Time Steps

shuffle
brush
stomp
flap
shuffle hop
shuffle ballchange
flap ballchange
flap heel
cramp roll
running flaps
shuffle ballchange shuffle step
shuffle ballchange shuffle hop step

You don't mention if these kids are first year or whether they have been dancing a while. I have 9 year olds doing some pretty amazing things because they have been dancing since they were 4. I also have some beginners who are 9.