Home
PLUS
AI Generator Tools
New
AI Image Generator
Delivering creativity at your imagination.
New
AI Image Upscaler
Scale your images up to 4x a click!
New
AI Generative Fill
Remove and replace objects in seconds!
New
AI Background Blur
Blur backgrounds to make subjects stand out!
AI Background Remix
Professional backgrounds for your products.
AI Image Extender
Extend your images to different ratios.
AI Writer
Best writing companion for the digital age.
AI Background Remover
Remove unwanted backgrounds easily.
123RF PLUS
Get creative solutions powered by cutting-edge AI tools.
Go PLUS
We have 2 new AI tools!
Check out AI Image Upscaler and AI Generative Fill now!
OK
Free Images
Stock
Photos
Vectors
Video
Audio
Fonts
Corporate+
Pricing
Support
en
English
Deutsch
Español
Français
Magyar
Italiano
日本語
한국어
Nederland
Język polski
Português (PT)
Русский язык
简体中文
繁體中文
Türkçe
Login
Go unlimited
Video
Options
PREMIUM
All Images
Photos
Vectors
Video
Audio
Fonts
FREE
PLUS
Female teacher stands at whiteboard and explains rules of addition in elementary school. Caucasian schoolmaster in glasses writes examples with marker on blackboard.
Play Video
Remaining Time
-0:00
Play
Progress: NaN%
Playback Rate
1.00x
Non-Fullscreen
4K UHD
MOV
3840 x 2160
25fps
54 MB
Download
vsevolodsmirnov
Follow
Preview
Share
X
Facebook
Pinterest
Report
Why are you reporting this?
Intellectual Property - Copyright and Trademarks
Violates 123RF Policies
Repetitive/Irrelevant Content
Inappropriate/Distasteful Content
Corrupted Content
Please describe the issue in detail.
Cancel
Submit
141081530
15s
Stock Video
Model Release
KEYWORDS
teacher
addition
calculate
whiteboard
marker
primary
elementary
school
education
writing
handwritten
classroom
calculation
number
one
plus
two
add
three
sum
learn
math
board
class
lesson
chalkboard
caucasian
hand
woman
white
standing
equation
example
smiling
arithmetic
indoor
answer
formula
symbol
tutor
adult
simple
attentive
holding
kindergarten
basic
showing
person
solve
female