Chapter 1: What is Combinatorics? Have you ever used a combination lock before? Two of the most common combination lock designs are shown below. Left:…

We learn the two mechanisms of nucleophilic substitution in school, namely SN1 and SN2. To recap, SN1 is a two-step mechanism involving first the leaving…

Autonomous materials are materials that can protect itself, heal damage and indicate if it is damaged throughout the course of its life cycle without any…

What is the purpose of science education, especially in upper primary and secondary school? In the past, a key focus of science education is equipping…

“Why are we learning about acids and bases?” my student once asked me. “Well,” I said with confidence, “the chemistry of acids and bases underlie…

Chapter 1: How do we count and represent numbers? In modern times, we use Arabic numerals to represent numbers. There are ten symbols that are…