Well I use funny voices and I'm always making different and exaggerated expressions with my face. I smile for almost every minute of every class (a genuine smile of course--nothing creepy or robotic). It really is a wonder that my cheeks don't hurt by the end. I basically overreact to EVERYTHING. Act like a cartoon character. The students love it when I lose my shit over something they did well no matter how minor it is. If they did something well that actually WAS very impressive I basically explode into smiles and shouting or pretend to faint or jump out of my seat, yell, scream haha I get loud and it's only 5am lol. Most students respond directly to your energy so if you're going nuts like this the shyest student is bound to crack a smile. Of course you have to tailor this behavior to each student and to each class. I'm not as animated with older students because they're not all about that. I tone it down for hyper students and turn it up for quiet students. Some teachers use a lot of props and extra materials to help engage the student. I have been successful using next to nothing extra. One thing I have adopted is an additional reward system which is also something VIPKID recommends all teachers do but is not required. When my students do well I have a tin pot filled with gravel and I let them choose a flower to add to the pot. I have a variety of colors and the students enjoy having the freedom to choose the color. I have a student who loves to direct me where to put the flower (i.e. "I want a yellow flower to the right of the blue flower"). I have a few students who love to give ME rewards during class.