Explore American Sign Language. Libraries have books and websites like Lifeprint.com are great resources.
It’s a good skill, helps build vocabulary and verbal skills. Seems that preschoolers are naturals -they just think it’s fun.
Encourage creativity, science and engineering: Make a craft station / work bench for projects. Fill it with all kinds of art supplies, engineering kits, tools, pegboard, etc. Stock safety equipment like goggles and make sure the area has good lighting. Lots of ideas on Pinterest, etc.
Practice sitting and standing "like a statue" to teach them how to be still. Start with a goal of 5 or 10 seconds, gradually move to 2 minutes. Same thing for "silent game" to teach them how to stay quiet when they need to. Bribery helps teaching this concept!
It’s okay to take a beat, a pause before you answer: “Hold on, let me think about how this is going to work...” I’ve seen a lot of mistakes or loss of confidence in an employee because they just blurted out a guess or starting off in the wrong direction only to have to go back- just because the plan hadn’t been thought through. It only takes a minute.
"Make yourself proud." Teach them to take pride in themselves - in their work, their behavior. Everything from a 3 year-old making her bed to a 10 year-old's homework. If they learn to keep going until they're satisfied it's done well, they won't need us to keep after them.
People learn all sorts of different ways. I found I learn best by repetition (drills) especially true for skills. And by listening for studying. Recording my lectures in college made a huge difference in my ability to learn and retain material. Let’s find what works for you.