Of all the girls, Martha and her wanted to go.

Not one of the boys could do his homework,

Both punctuation and grammar are incorrect.

As Wondergirl noted, you have more than punctuation problems in both of them.

All wrong. Try again.

Read them both again.

Of all the girls, Martha and her wanted to go.

Martha and who? Who are all the girls? Where are they going? Very confusing sentence.

Not one of the boys could do his homework.

Do whose homework? How many boys tried to do this other boys homework? Why isn't he doing his own homework?