Train-up A Child Bible Studies are written by an educator who homeschooled her children. The elementary studies are illustrated and based on the NIrV Bible, which is written at a 3rd-grade reading level; the teen studies are based on the NIV, which is written at an 8th-grade reading level. The studies are written so that the student can sit down with his/her Bible and work independently. An answer key is included at the end of each book. The elementary titles are character studies: obedience, self-control, kindness, humility, thankfulness, and responsibility. The teen study titles are Godly Relationships, Jesus in the Old Testament, Bible Covenants, A Journey through the Old Testament, and A Journey through the Gospels and Acts.