Stock videos of Quadro negro

Empty chalkboard with wooden easel on green field background

Blank chalkboard with wooden easel on green field

Chalk board animated background, 4k video footage

3D animation empty blackboard hanging under clock on blue wall behind teacher table in light classroom at school.

School blackboard. Blackboard for children. Blackboard on kitchen close up 4K

Black chalk board background and coloured pieces of chalk.

Hand drawing five stars rating on chalkboard animation

Business concept: light bulb icon hand chalk drawn on black chalkboard background and lot of arrows around, Animated video. Light bulb is drawn on the board, the light is lit and moving arrows appear.

Word idea chalk written animation on the blackboard inside the cloud speach bubble

The teacher writes on the board at the college.

School supplies and chalkboard with blackboard, animation illustration

Business concept: speaking of people. two man in ties silhouette and speak bubbles chalk hand chalk drawn on black chalkboard speak bubbles zooming in at the end, Copy space for your conversation text

Hand drawn countdown on the dark green chalkboard. Countdown transition White paint chalk brush strokes. Animation hand painted brushstroke. Freehand writing count down.

Mistake in math formula on chalkboard, education concep

Street lighting. a little girl writes an equation on a blackboard with chalk

Business concept: light bulb icon hand chalk drawn on black chalkboard background and lot of arrows around, Animated video.

Teacher writes on the chalk board on 13 September. Classwork

Street lighting. a little girl writes an equation on a blackboard with chalk.

Woman's hand writing "HOLIDAY" with white chalk on blackboard

Green man painted chalk on a blackboard standing on the head out from crowd of plenty identical white fellows. Leadership, uniqueness, independence, initiative, strategy, dissent, business concept.

A girl in a red T-shirt is standing near the blackboard

Woman writing word PENSION on chalkboard

Motivation blackboard notice Inspirational business phrase Short video

Woman's hand writing "GOODBYE" with white chalk on blackboard

Womans' hand writing on the blackboard chalkboard smileys face

Woman's hand writing "SUMMER" and drawing sun with white chalk on blackboard

Female hand holds blue chalk and writes back to school on black chalk board, start of the school year

Woman's hand writing "MIND" with white chalk on blackboard

Tired student with many books passing by blackboard in classroom

Woman's hand writing "RULES" with white chalk on blackboard

The teacher writes homework

Woman's hand writing "PARTY" with white chalk on blackboard

Street lighting. a little girl writes an equation on a blackboard with chalk.

A girl in a red T-shirt is standing near the blackboard

Electric light bulb on chalkboard.

A teacher in a black suit writes with chalk, mathematical equations on a black board. School concept

Male hand on blank school board writes in chalk: 2020! and puts a smile - Happy

Female hand holds white chalk and writes back to school on black chalk board, start of the school year

Top view. Woman writes the word LESSON 5 with chalk on a blackboard. 4K

Woman's hand writing "FUN" with white chalk on blackboard

Loading icon on chalkboard background, chalk drawing animation

Man's hand crosses out inscription 2020 on school board and then erases what was written with wet sponge or rag

Feedback concept, woman drawing rating stars on blackboard

Hand Holding Chalk and writing a Mathematical Formula or Equation on the Blackboard .

Beautiful school girls front blackboard High Definition animation colorful scenes

Woman's hand writing "MONEY" with white chalk on blackboard

A girl in a red T-shirt is standing near the blackboard

Woman's hand writing "WELCOME" with white chalk on blackboard

Top view footage of professor writing algebra formulas on blackboard. Caucasian man solves maths problems. Concept of proving theorem. Smart teacher explains material. Theme of education and science.

Womans' hand writing on the blackboard chalkboard smileys face with sad emotion

A girl in a red T-shirt is standing near the blackboard

Woman's hand writing "I LOVE YOU" with white chalk on blackboard

World Chalk Sketch on Blackboard Looping Animation

A girl in a red T-shirt is standing near the blackboard

Womans' hand writing on the blackboard chalkboard goodbye

Woman's hand writing "BE CAREFUL" with white chalk on blackboard

Female teacher's hand draws numbers from 0 to 9 chalk on the board, animation chalky numbers, direct countdown 0-9. Loopable

Woman's hand writing "MOTIVATION" with white chalk on blackboard

Womans' hand writing on the blackboard chalkboard au revoir - french goodbye

A girl in a red T-shirt is standing near the blackboard

Male hand on blank school board writes in chalk: 2021! and puts a smile - Happy

Back to school chalkboard, Animation Design, HD 1080

Woman's hand writing "BRAIN" with white chalk on blackboard

Womans' hand writing on the blackboard chalkboard bonjour - french hello

Top view. Woman writes the word LESSON 4 with chalk on a blackboard. 4K

Top view. Woman writes the word LESSON 3 with chalk on a blackboard. 4K

Woman's hand writing "OPEN, CLOSED" with white chalk on blackboard

Womans' hand writing on the blackboard, chalkboard

Woman's hand writing "DAY 1, 2 & 3" with white chalk on blackboard

Human hand writes in chalk the inscription 2020 on a school blackboard, wooden frame

Woman's hand writing "GOAL" with white chalk on blackboard

Natural light. a girl with white hair draws on a blackboard. With chalk.

Silhouette chalk drawings animation on a blackboard of advertisement frame. Hands holding a piece of paper flat design. Copy space for your text inside the frame of page.

Teacher is explaining something at the blackboard

Woman's hand writing "NOW, PAST, FUTURE" with white chalk on blackboard

Womans' hand writing on the blackboard, chalkboard see you

Cute school kids talking front blackboard High Definition animation colorful scenes

Woman's hand writing "SCHOOL" with white chalk on blackboard

Top view. Woman writes the word LESSON 1 with chalk on a blackboard. 4K

Woman's hand writing "BE HAPPY" with white chalk on blackboard

Woman's hand writing "SCHEDULE" with white chalk on blackboard

Concepts on blackboard at school. Young people, students and pupils in classroom. Intelligent and smart hispanic boy in class. Portrait of male kid smiling, having good idea

Top view. Woman writes the word OFFICE with chalk on a blackboard. 4K

Beautiful college student from writing on the blackboard with chalk.

Woman's hand writing "DRIVE SAFE" with white chalk on blackboard

Woman's hand writing "EPISODE 1, 2 & 3" with white chalk on blackboard

Womans' hand writing on the blackboard chalkboard Tchus

Happy student with many books passing by blackboard in classroom

A girl in a red T-shirt is standing near the blackboard

Woman's hand writing "MESSAGE" with white chalk on blackboard

Close-up of male hands in a black suit, the teacher writes math equations on a black chalkboard. School concept

Woman's hand writing "SOS" with white chalk on blackboard

Woman's hand writing question "WHAT'S YOUR GOAL?" with white chalk on blackboard

Goals For 2020! written with color chalk. Supported by an additional services. Blackboard concept

Woman's hand writing "CONCEPT" with white chalk on blackboard

Portait of schoolgirl in a medical mask writes in chalk the english alphabet in classroom, pupil look on camera near blackboard at school