**9. Implementation in the classroom**

Learning in the classroom begins with understanding the concept of relations and functions using conventional approaches, but students are asked to make the association between the two functions without involving the phenomenon. Then introduced didactical phenomena of science to the students by presenting a power point presentation as an observation summary of the sneaking of a "clay ball", asking students for taking note the time in respective bottle of sugar solution (0‐50%). Furthermore, students record each of the events and copy them into a table that has been provided. Moreover, the students also observe how the burning of fireworks takes place and record the time duration of fireworks burning from start to fin‐ ish. Other thing that be learned by the students in the classroom was in making association between the wide hole of diameter of faucet and the debit of flowing water for each fau‐ cet. However, due to space limitations to address all the learnings in this chapter, a team of authors only discussed part of the sugar solution.
