Bounces in parallel and devlopment

This video is showing our first lesson on learning the developments for the cunningham exercises, so as you can see that they are not going to be perfect!!
aas you can first see at the time 0.04 my 'arched' back isnt so arched! This is because my back is to low down, i need to bring my back up more and  make more of a top arch in the upper part of my spine. a good thing that i noticed is that my arms are very structured and not floppy. also when bringing my arms up and getting them ready for plie at 0.08 my arms have good alignment. At 0.35 you can see, that compared to the others in my class, i havnt got and arched back and i really do need to work on this and getting my back arched. at 0.53 you can see that my plie is low and i really try to put alot of effort in pushing myself to the limit of how low i can get. we then moved on to the bounces in parallel development, at one minute exactly you can see that i am really looking at my back in the mirror to make sure thqat i can get a good cruve. And you can see that i have a curved back  and it is quite good but could have improvements. also at this time you can see that my arms are high and in line with my body and not to far back/forward. At 1.03 you can see that my toe is pointed well, but you can also see that i havent got much of an arch anymore so i need to work on this. at 1.26 i did a turn, i need to neaten up my arms on this turn but my balance was good.

Improvements:
- to work on my arched back on bounces in parallel
- to work on my curved back whilst lifting off the floor

How to work on these improvements
- when trying to get an arched/curved back i could work on this by flexing my spine more so it has the moblity to stay there without it hurting. Also i could practice these exercises to make myself better.