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kiddoworksheets
Kiddo Worksheets has a lot of free educational resources. Get free printable worksheets for Preschool, Kinderg
kiddoworksheets.com
Things Workshop
Rotate it, slow it down, watch every stroke. Engines, gears, turbines and the human ankle as interactive 3D mo
things-workshop.com
Ba Ba Dum
Learn everyday words in 21 languages through five quick picture games, with bold illustrations and native audi
babadum.com
Car Anatomy
An interactive 3D car you can take apart: engine, gearbox, brakes and suspension, each explained in plain Engl
underthehood.online
Chemical Equations Online
Type the reactants and it predicts the products and balances the equation, with the steps shown.
chemequations.com
DOF Simulator
Pick a camera, lens, aperture and distance and watch the depth of field and background blur change on a sample
dofsimulator.net
Entertrained
Practise typing by retyping classic novels page by page, so your speed drills double as reading time.
entertrained.app
Hooktheory
See the chords and melody of thousands of pop songs laid out on a timeline, and learn why progressions work th
hooktheory.com
keybr.com
Typing lessons that adapt to the keys you're worst at, generating pronounceable nonsense words until your weak
keybr.com
LanguageGuide.org
Hover over illustrated scenes to hear the word for each object spoken by a native speaker, in dozens of langua
languageguide.org
muted.io
Clean, interactive music theory tools: a piano and fretboard for scales and chords, a circle of fifths and qui
muted.io
NB Chemistry Lab
A virtual chemistry lab in 3D: pick up glassware, mix reagents and watch the reactions happen without breaking
chemistry-en.nobook.com
PCBX Simulator
Build Arduino circuits on a 3D breadboard in the browser, wire up displays and LEDs, and run real code against
pcbx.com
Skill-Lync Resources
Free mini courses on engineering topics like finite elements and fluid dynamics, with interactive diagrams ins
resources.skill-lync.com
Symbolab
Type in an equation, integral or proof and get the solution worked through step by step.
symbolab.com
Tiled.art
Escher-style tessellations from artists around the world, with animations that show how each shape interlocks
tiled.art
VisuAlgo
Step through sorting, graphs, trees and other data structures as animations, built by a university to teach al
visualgo.net
CarCareKiosk
Short how-to videos for almost any car's basics, from fuses to wipers to oil, filmed on the actual model you d
carcarekiosk.com
Class Central
A search engine for online courses across every university and platform, with reviews and a list of the ones t
classcentral.com
Coddy
Bite-sized interactive coding lessons in Python, JavaScript, SQL and more, with a daily challenge to keep the
coddy.tech
Codédex
Learn Python, HTML, CSS or JavaScript through a fantasy-style quest with pixel art, short exercises and badges
codedex.io
Cymath
Type an equation, derivative or integral and get a full step-by-step solution, not just the answer.
cymath.com
edclub
The classroom edition of TypingClub: hundreds of typing lessons with games and progress tracking for schools.
edclub.com
Electude Simulator Challenge
Diagnose a broken engine with a virtual multimeter and wiring diagrams, the way trainee mechanics do. Scored a
simulator.electude.com
Hacksplaining
Short interactive lessons where you carry out real attacks like SQL injection and XSS yourself, then learn how
hacksplaining.com
Instructables
Step-by-step photo guides for making almost anything, from furniture to robots to cakes, written by the people
instructables.com
LingoHut
Free vocabulary lessons in dozens of languages with native audio, flashcards and listening games.
lingohut.com
Loecsen
Essential phrases in over fifty languages, each with an illustration and native audio. A no-pressure way to pi
loecsen.com
MIT OpenCourseWare
Lecture notes, problem sets, exams and videos from thousands of real MIT courses, free to everyone and openly
ocw.mit.edu
Musicca
Free music theory exercises for reading notes, intervals and chords, plus a virtual piano, guitar and drum kit
musicca.com
Photoskop
Learn aperture, shutter speed and lighting by playing with a virtual camera and studio, with the photo updatin
photoskop.com
Toy Theater
Simple maths, reading and art games for young children, with virtual manipulatives that teachers actually use
toytheater.com
TypingBird
Typing lessons and arcade-style games that build speed and accuracy, gentle enough for kids.
typingbird.com
Animagraffs
Long animated infographics that take apart a car engine, a fire truck or a city's water system and show every
animagraffs.com
Learning Synths
Ableton's playful course on synthesizers. Each lesson changes one knob on a synth in your browser, so you hear
learningsynths.ableton.com
Math is Fun
Plain-language, illustrated explanations of maths from counting to calculus, with puzzles and little interacti
mathsisfun.com
Mathigon
An interactive maths textbook that talks back, plus Polypad, a virtual box of tiles, dice and number bars to e
mathigon.org
musictheory.net
Short, clear lessons on notes, scales and chords, plus drills and ear trainers. The site music teachers have p
musictheory.net
OpenStax
Peer-reviewed college and high-school textbooks from Rice University, free to read online or download. Physics
openstax.org
Project Euler
Hundreds of maths problems you can only solve with code, where the brute-force answer takes a week and the cle
projecteuler.net
BetterExplained
Maths taught the way it should have been the first time: intuition and analogy first, formulas afterwards. The
betterexplained.com
Red Blob Games
Amit Patel’s interactive explainers on pathfinding, hex grids, noise and map generation. The A* article alone
redblobgames.com
Seeing Theory
Probability and statistics taught as things you drag: sample from a distribution, watch a regression line sett
seeing-theory.brown.edu
Cryptopals
Crypto challenges that teach you how ciphers break by making you break them yourself.
cryptopals.com
freeCodeCamp
Thousands of hours of coding curriculum, entirely free, with certifications and real projects.
freecodecamp.org
Setosa — Explained Visually
Hard statistics concepts turned into things you can drag: eigenvectors, conditional probability, PCA.
setosa.io
Advent of Code
A December calendar of programming puzzles with a story, a leaderboard and a devoted community.
adventofcode.com
Khan Academy
Free, structured courses from arithmetic to art history, with practice that adapts to you.
khanacademy.org
The Evolution of Trust
A playable introduction to game theory that explains why cooperation appears, and why it collapses.
ncase.me
Grid Garden
The same trick as Froggy, but for CSS grid. Water your carrots with grid-column-start.
cssgridgarden.com
Wolfram Alpha
A computational knowledge engine that answers questions with worked steps rather than links.
wolframalpha.com
Nicky Case
Playable posts about game theory, mental health and emergence that treat you as a participant.
ncase.me
Flexbox Froggy
Learn CSS flexbox by guiding frogs onto lily pads. Twenty-four levels and it finally sticks.
flexboxfroggy.com
Desmos Graphing Calculator
A graphing calculator so fast and pleasant that it turns algebra into doodling.
desmos.com
Explorable Explanations
A hub for learning by playing: dozens of interactive essays on maths, society and systems.
explorabl.es
Exercism
Practice problems in seventy languages with free mentoring from real humans on your solutions.
exercism.org
3Blue1Brown
Mathematics with a visual soul: linear algebra, calculus and analysis animated into real intuition.
3blue1brown.com
Bartosz Ciechanowski
Long, gorgeous interactive essays explaining how gears, cameras, GPS and light actually work.
ciechanow.ski
OverTheWire
Security wargames played over SSH, starting from absolute beginner. The classic on-ramp.
overthewire.org
The Odin Project
A full-stack curriculum that makes you build things rather than watch someone else build them.
theodinproject.com
Distill
Beautifully typeset, interactive machine learning research. Archived, but still the high water mark.
distill.pub