Coding in school, Std by Std. Tap blocks or type real commands, and watch your program draw, move and play. It all runs inside this page: no installing, no internet needed.
🎨 Open the playground 🐱 Scratch projects 🎮 Coding games
Decomposition: split a problem you cannot solve into parts you can.
Start → Lesson 2
An algorithm is a general recipe: repeat n times, go forward, turn 360 divided by n.
Start → Lesson 3
Repeated addition inside a loop builds a sequence, and you can predict it before you run it.
Start → Lesson 4
A variable can hold the state a program is in, and conditions decide how it behaves in each state.
Start → Lesson 5
A block built from a block built from a block: self-similar patterns from three tiny definitions.
Start → Lesson 6
Languages differ in punctuation, not in ideas: a loop is a loop everywhere.
Start →Design a logo. Decompose it into parts first, write one block per part, and keep every block short enough to test on its own. Join them only at the end, and you will know exactly where to look if something is wrong.
Build it →ProjectDraw a board for a game you invent: snakes and ladders, a maze grid, or a race track. Use loops for the rows, a variable for the square size, and a condition to colour alternate squares. Then write the rules of your game on paper.
Build it →a star in the middle of a run splits that run into two repeats
Play →Mazepar 7a loop inside a loop: the inner loop walks two squares, the outer loop repeats the whole step
Play →Mazepar 15an outer loop can repeat a whole journey that already contains loops of its own
Play → Bug huntA spiral whose sides get longer as it turns.
Fix it →Bug huntA flower of six petals, drawn with your own block.
Fix it → Draw★★★★Draw this picture: twelve squares turned around the same centre, with a ring of dots outside them.
Draw it →Draw★★★★★Draw this picture: a snowflake with six arms, each arm carrying two small twigs.
Draw it →
Ask GuruAcharya Samayeshwar
