Put these blood vessels and chambers in the proper order for blood flow through the heart and lungs - beginning with the superior and inferior vena cava.

You didn't include a list, so omit anything that doesn't appear in your instructions. Here's structures in order of blood flow:

Superior and inferior vena cava 
right atrium
tricuspid valve
right ventricle
pulmonary semilunar valve
pulmonary arteries (2 - one to each lung)
lungs
pulmonary veins (4 - two return from each lung)
left atrium
bicuspid, or mitral valve
left ventricle
aortic semilunar valve
ascending aorta