Is my refusal of job opportunities in Arab and Islamic schools to teach Arabic language and Quran considered a shortcoming towards the Ummah and a sin, given my desire to take care of my home and family and avoid placing my daughters in daycare?

We advise you to combine the virtue of teaching these individuals with seeking reward from Allah, due to the abundant good contained therein. It was narrated from Ali (may Allah be pleased with him): "Allah did not obligate the ignorant to learn until He obligated the knowledgeable to teach." Be keen on focusing on the Quran and its interpretation, and teaching matters of creed and worship, for it was narrated that "teaching children the Book of Allah extinguishes Allah's wrath, and teaching something in childhood is like engraving on stone."