Your feet are the secret to better photos

Nikon D750, AF-S NIKKOR 28-300mm f/3.5-5.6G ED VR, ISO 5000, ƒ/5.6, 1/100–Off camera flash Neewer TT850 triggered by the Neewer 433MHz Wireless 16 Channel radio remote set to 1/128th power and with gels and grid

I love it when you are able to get super close because the people forget about you. Here this boy is deep into his computer software and the teacher is helping him.

This takes time.
Nikon D750, AF-S NIKKOR 28-300mm f/3.5-5.6G ED VR, ISO 6400, ƒ/5.6, 1/100–Off camera flash Neewer TT850 triggered by the Neewer 433MHz Wireless 16 Channel radio remote set to 1/128th power and with gels and grid
Now if I did this just once you might think it is luck, but trust me once you let people feel comfortable with you and you are non threatening you can get really close and get better photos.
Nikon D4, AF-S NIKKOR 14-24mm f/2.8G ED, ISO 1100, ƒ/5, 1/100
This photo is shot with a 14-24mm and I am shooting zoomed as wide as it will go at 14mm. All of the photos in this blog I can just take my hand and reach and touch the main subject’s face. 
This is the key to your photos looking better–Get closer with your feet. You should be able to touch your subject because you are too close most of the time.
Nikon D750, AF-S NIKKOR 28-300mm f/3.5-5.6G ED VR, ISO 1600, ƒ/5.6, 1/100
Notice the difference when you work this close from the 14mm to this photo at 28mm. Starts to look like a telephoto lens.
By getting close and using ultra wide-angle lenses you get a sense of place. You can see the other students and how they are working. I try to put the audience in the room with me.
Nikon D750, AF-S NIKKOR 28-300mm f/3.5-5.6G ED VR, ISO 1600, ƒ/5.6, 1/100
Here I stepped just a little back and zoomed in to 42mm. Notice how distant you are in comparison?
You want you photos to look better then use your feet and get close enough you can touch your subject.
There are a few exceptions and wildlife is one of those exceptions. I like to use really long lenses like 500mm or 600mm so I live to have another day.