Abacus
Abacus and its shadow
Marker pen and abacus
Abacus and calculator
Calculator
Calculator and papers
Paper clips
Light glowing in the dark
Mannequin
Rope about to snap
Running water
Bottle and its reflection
Face of mannequin
Lightbulb
Message in a bottle
Chain
Mannequin's face
Close-up on mannequin's face
water tap
Coloured pencils
Pen and ink
Calligraphy pen and computer desktop
Hour glass
Boy playing chess game
Naked mannequins
Abacus against black background.
Wooden abacus against black background.
Phone receiver
Close-up on mannequin's eye
Light bulb
Hammer
Cordless phone
Pen and document
surgeon equipment cable
education flash cards
Bird's eggs on the nest
Email
Enter stock
Computer screen
Placing magnifying glass near to a globe
Computer desktop
USB connector
Books and spectacles
Close-up of a palmtop
Arrangement of credit cards
Pages
Dummy lying on a stack of books
Pen and paper
Spectacles on a book
Coins stock
Papers,bill or receipt
Pencils
Laptop
Organizer
Device
Reference book
Reference books
Loaded wallet
Credit cards
Royal flush
Chess game
Chinese chess
Chess pieces
Knight
Bishop
Computer mouse
Colourful crayons
Colourful crayon
Abacus on Case
Small girl with abacus on white
Boy playing chess
Tin can telephone
Think outside the box written on a speechbubble
Stopwatch
Yellow crayon
Pencils standing in a container
Pencils in a container
Abacus and toys on DIY shelves hanging on leather strips
Laptop and thumb drive
school concept, pencil and calculator in closeup, selective focus
educational concept, selective focus on writing part of pencil
doing math, selective focus on nearest part of pencil
calculation concept with pencil and notebook, focus on center of photo
writing red pencil in closeup, selective focus on center
writing yellow pencil in closeup, selective focus on center
Mannequin crying
MP3 player
Three dices
Blue colour drink
Globe
Three dices on a bee hive frame
Books and a cup of coffee
Mobile phone
Boy as a chess game winner
Mobile phone and computer mouse
Book and pencils
Sharpener and pencil
Curves of colored papers on white background
Divisions of Colored papers, close-up
Curves of colored papers on black background
Glowing abstract gas
Idea on keyboard
King
Compass on computer keyboard
Compass
Quill pen writing on orange paper over blue background
Quill pen leaving a colorful trace over cyan background
Quill pen and inkwell over blue background
Know thyself written on a speechbubble
Blank sheet of paper, pencil and crumpled papers on black wood
selective focus on center of photo, writing part of pen
Math on cards held by hands
Abacus on white background
そろばん
Let’s get creative written in a speechbubble
Imagination written in a speechbubble
Purple ink on black background
Blue ink on white background
Girl with abacus on white
Abacus sitting on a tabletop.
High Angle View of Child's Hands on White Toy Calculator
Logarithmic slide rule
Abstract coloured light patterns.
Compass and map
Credit card
Dummy carrying a globe
ATM cards and accounts book
Globes
Plastered globe
Dollar sign on computer screen
Calculator on grid gray background
Child using an abacus