Punctuating transition words

Front

Correctly punctuated sentence:

Back

Writing is a challenge for me, especially writing essays.

Front

Punctuate correctly: I enjoy sports, like netball and gymnastics.

Back

I enjoy sports, like netball and gymnastics.

Front

Punctuate correctly: I will wait until dad gets home, unless it's too late.

Back

I will wait until dad gets home, unless it's too late.

Front

Is this sentence punctuated correctly? Currently, I study English and Maths. Additionally, I take Science and Sport.

Back

Yes