I am interested in searching for the best procedures and techniques of teaching STEM to motivate and sustain students' interest in STEM particularly chemistry. p
I think the better way for you to introduce the new techniques of STEM to the students is that, you summary some scientific concerns that didnot solved by traditional skills, are recently settled by new approches of STEM related techniques. There are newest published reportes that contain lots of beautiful images, mapping spectra, which is quite attactive to the students.
I have been teaching chemical engineering for the last 18 years. Students today are more engaged if they are aware of why they are to learn a particular topic up front. Simply saying that they will need it later does not work well. For instance, teaching oxidation/reduction potentials will be better retained if the students are aware of how the topic applies to improving battery manufacturing and energy storage, minimization of corrosion, etc. They need to know not only the "what", but also the "why". Active learning and problem-based learning are also excellent tools. Richard Felder has written volumes on these topics and is very worthwhile to give a read to his experiences in the classroom.
2.) shorter, yet more in depth conceptual lectures closely tied to real world scenarios (Relevancy through story telling)
3) incorporation of visuals via technology in lectures. (Use of technology to embed STEAM concepts into students).
Using such techniques in my math and physics courses, I have found to work extremely well with my students. Projects helped students to employ knowledge and gain transferable skills in computational thinking, logic and research. They were eager to understand how the things worked the way they did and how to connect math into the project using computational thinking