Tarek ibn Ziyad Academy (TIZA) -- named for the Muslim general who conquered medieval Spain -- is a K-8 charter school in Inver Grove Heights. Its approximately 300 students are mostly the children of low-income Muslim immigrant families, many of them Somalis. The school is in huge demand, with a waiting list of 1,500. Last fall, it opened a second campus in Blaine. TIZA uses the language of culture rather than religion to describe its program in public documents. According to its mission statement, the school "recognizes and appreciates the traditions, histories, civilizations and accomplishments of the eastern world (Africa,...