Unsplash logo
Unsplash Home
A magnifying glass
Log in
Submit an image
Explore
Today
Images
Backgrounds
Wallpapers
Advertise
Get Unsplash+
Log in
Submit an image
navigation menu
Dan Cristian Pădureț
Available for hire
A checkmark inside of a circle
A heart
A plus sign
Download free
Chevron down
––– –– ––
––– –––– ––––
––– –– ––
––– –––– ––––
A forward-right arrow
Share
Info icon
Info
More Actions
a blackboard with a bunch of diagrams on it
https://paduret.com/
Calendar outlined
Published on
October 24, 2021 (UTC)
Safety
Free to use under the
Unsplash License
black
school
learning
math
physics
smart
nerd
calculate
formula
geometrics
plan
blackboard
diagram
plot
Free images
Browse premium related images on iStock | Save 20% with code UNSPLASH20