The medal's obverse bears teacher surrounded by group of students and chemical flasks. Around, AWARDED FOR EXCELLENCE IN PRE HIGH SCHOOL CHEMISTRY TEACHING; signed on truncation of pupil at right bottom, J. E. R. Sc.
The reverse bears chemical vessels, book and banner for engaving. Around, PRESENTED BY / CHEMICAL MANUFACTURERS ASSOCIATION; on banner, AWARDED TO
This medal comes in (two or) three flavors: one for college level teaching, one for high school, and one for pre-high school. Dick Johnson, who is the authority for anything related to the Medallic Art Company only lists the first two but not this member of the set.
References: MACo 1957-046