1. In the past, education focused only on rote memorization of facts, but modern teaching views each child as unique and helps them grow according to their abilities.
2. The passage discusses how increases in population and knowledge have impacted education and how instructional materials can help learning if used effectively. It aims to study how materials affect student performance in private schools.
3. The background provides context on the study, which examined how modern instructional materials correlate with academic performance in biology classes and how teacher knowledge impacts material effectiveness.