If your child brings home a MAPSI practice test, don't just check the score. Ask them why they chose that answer. If they can explain the connection between the Arabic script and the Islamic law, they have already won.
Stop teaching PAI and BTQ separately. Mix the curriculum. Ask your students why a particular Tajweed rule exists in a verse about patience. Connect the grammar to the guidance.
In many schools, children can recite the Quran beautifully (BTQ) but have no idea what the verses command them to do (PAI). Conversely, some children memorize the theory of Zakat but cannot read the word "Zakat" in a Quranic script.