新学期が

the new school term

→ 新学期
phrase Rare #41,665
the new school term 新学期 means “new school term” or “new semester,” and が marks it as the subject of the sentence. The phrase is commonly followed by 始まる or スタートする, meaning that the new term begins or starts.
JA: 新学期が来週から始まります。
EN: The new school term starts next week.

新学期がスタートしました

The new school term has started.

四月から新学期が始まる

The new school year starts in April.

まもなく新学期が始まります

The new school term will begin soon.