Is it permissible for a woman observing the 'iddah (waiting period) due to the death of her husband to attend Quran memorization classes during the 'iddah?

A woman whose husband has passed away must observe a waiting period (iddah (definition)) in her home for four months and ten days. She should not leave except out of necessity or need. The Prophet, peace and blessings be upon him, clarified this, saying: "Remain among your family until the Book reaches its term." Among the needs that permit going out during the day is attending Quranic lessons.