Cooking and Baking is the only Chemistry every single one of us needs to learn. 

Once the Student has a solid comprehension of Music, Art, Theater, Reading/Writing, Word, Logic, Engineering, Math/Calculus, and Physics, Only THEN can Chemistry be introduced. 

Chemistry comes after Physics and runs parallel to Calculus. 

This is the Science of How things interact and react to each other. 

I would place this around 15 and 16 years old or 10th Grade. A solid understanding in Logic, Math, and Physics is mandatory. 

It should only be made available to Students who seek to pursue a career that relates to Chemistry. 

Cooking should be introduced early, from 5 years old and on. Japan has a beautiful process for integrating Chemistry, Cooking, and Nutrition into the School Curriculums from 5 years old and on, and this is the model The Healing Garden follows.