36

Beaufort Wind Scale Visualizer – Online Speed & Sea State

Drag a slider to see wind speed in knots/mph/kmh and the corresponding sea conditions and land effects.

Education Beaufort scale visualizer wind

31

Visual Fraction Adder – Online Slice & Combine Pies

Drag pie slices to represent fractions and see them added together. Great for visual learners.

Education add fractions visual

30

Bibliography Alphabetizer – Online Sort References by Author

Paste a list of references and sort them A‑Z by first author. Handles various formats.

Education alphabetical bibliography sort

25

Kanji Stroke Count Quiz – Online Guess & Order

A kanji appears; you guess how many strokes it has. Learn stroke order awareness.

Education Japanese kanji stroke

25

Famous Painting Quiz – Online Guess Artist & Title

See a clip of a famous artwork and choose the correct title. Art history fun. Local images.

Education art painting quiz

25

Cursive Typing Practice – Online Fun Script Keyboard Input

Type a passage and see it appear in a realistic cursive font. Helps connect handwriting to digital text.

Education cursive practice typing

25

Scientific Notation Converter - Online Exponential & Decimal Swap

Convert between scientific notation (a × 10^n) and decimal form. Also supports engineering notation. Instant, local.

Converter converter exponential scientific notation

24

Poetry Meter Detector – Online Iambic, Trochaic, etc.

Paste a line of poem and see which syllable stresses create a particular meter. Educational tool.

Analyzer iambic meter poetry

24

Sentence Stretcher – Online Add Details for Length

Type a simple sentence and get guided prompts to add who, what, where, when, why. Build richer sentences.

Education expand sentence writing

24

Typing Layout Visualizer – QWERTY, Dvorak, Colemak

Compare standard keyboard layouts side-by-side. Click keys to see characters. Useful for learning alternative layouts.

Education keyboard layout visualizer

23

Number Line Generator - Online Printable Math Visual Aid

Create custom number lines (0-20, negative, fractions, decimals) for math education. Adjustable ticks and labels. Instant download.

Education generator math number line printable

22

Morse Code Speed Tapping Game – Online Decode & Type Race

Morse characters flash on screen; you must tap them correctly on a single button. Points for accuracy and speed. Learn Morse in a fun way.

Education game morse code tapping

22

Free Fall Calculator – Online Time, Speed, Distance

Enter height and get fall time and impact speed. Simple physics demo. Good for students.

Calculator calculator free fall physics

22

Famous Book Quote Finder – Online Search by Keyword

Enter a keyword or author to find classic quotes from public domain works. Inspiration tool.

Education book quote finder literature

22

Percent Error & Relative Error Calculator - Online Lab Report Tool

Calculate absolute error, relative error, and percent error between experimental and theoretical values. For science students. Instant local math.

Calculator calculator percent error science

22

Alphabet Tracing Worksheet - Online Preschool Letter Practice

Generate customizable alphabet tracing sheets with uppercase and lowercase letters. Select letters to focus on. Instant print. Local only.

Education alphabet preschool tracing worksheet

22

US States & Capitals Quiz - Online Geography Memory Game

Interactive quiz to learn all 50 US state capitals. Choose mode: capital to state or state to capital. Map highlight available. Works offline.

Education capitals geography quiz US states

21

Coin Toss Probability Demonstrator – Online Long‑Run Simulator

Virtual flip coins thousands of times and see the heads/tails ratio converge to 50%. Interactive law of large numbers.

Education coin probability statistics

21

Old English / Anglo‑Saxon Word Lookup – Online Basic Translator

Type a modern English word and get a possible Old English equivalent. Works offline with a limited but curated wordlist. Learn history.

Education Anglo-Saxon historical Old English

21

Spring Constant & Elastic Energy Calculator – Online Hooke's Law

Enter spring constant and displacement to find force and stored energy. Visual compression.

Calculator energy Hooke spring

21

Bird Call Identification Quiz – Online Listen & Match

Hear a common bird song and choose the correct species from multiple choices. Ear training for birders.

Education audio bird call quiz

21

Common Fossil Identifier – Online By Pattern & Shape

Identify common invertebrate fossils (ammonite, trilobite, brachiopod) from sketches. Amateur paleontology.

Education fossil identifier paleontology

21

Schmidt Sting Pain Index Explorer – Online Insect Ratings

Interactive list of stinging insects ranked by pain level with descriptions. Fascinating entomology.

Education insect Schmidt sting pain

21

Cloud Type Identifier & Quiz – Online Cirrus, Cumulus, Stratus

Learn to identify the 10 basic cloud types from photos. Self‑test quiz mode. Useful for pilots and hikers.

Education cloud identifier quiz

21

RSVP Speed Reading Trainer – Online Flash Words

Paste text and set display speed for Rapid Serial Visual Presentation. Train your reading speed.

Education RSVP speed reading trainer

21

Simple Circuit Simulator – Online Visual Resistor LED

Drag a battery, resistor, LED onto a grid and simulate current flow. Show Ohm's law in action.

Education circuit physics simulator

21

On This Day Trivia Generator – Online Historical Events

Shows a random historical event that occurred on today's date. Fun daily knowledge snippet.

Education history on this day trivia

21

Multiplication Grid Challenge – Online Fill the Times Table

Complete a 10x10 multiplication grid against the clock. A fun way to master times tables.

Education grid multiplication quiz

21

Spaced Repetition Flashcards - Online Leitner Box Method

Create cards and review using a spaced repetition algorithm (Leitner box simulation). Cards stored locally. Improve exam prep.

Education flashcards Leitner spaced repetition

21

Final Exam Grade Calculator - Online What You Need to Score

Determine what score you need on your final exam to achieve your target overall grade. Enter current grade, weight, desired grade. Local only.

Calculator calculator final exam grade

21

Cursive Writing Worksheet Generator - Online Traceable Handwriting

Type any text and generate a printable cursive handwriting practice sheet with dotted lines. Choose font styles. Local generation.

Education cursive generator handwriting worksheet

20

Homework Time Estimator – Online Break Tasks Into Chunks

List assignments with estimated minutes. See total time and break into Pomodoro sessions. Stay motivated.

Education homework planner time

20

Classroom Seating Randomizer – Online New Assignments Each Day

Enter student names and desks layout, then scramble periodically. Print new seating chart.

Education chart random seating

20

Ham Radio Q‑Code Quiz – Online Test Your Knowledge

Randomly show a Q-code and select correct meaning. Learn while having fun. For your license exam.

Education ham radio Q-code quiz

20

Morse Code Audio Practice – Online Random Character Group

Play random Morse characters at configurable speed. Learn with Koch or Farnsworth method.

Education audio morse code practice

20

Rock & Mineral Identification Key – Online Decision Tree

Answer yes/no questions about color, hardness, streak, luster to narrow down common rocks and minerals.

Education identification mineral rock

20

Word Search Puzzle Maker – Online Create & Print

Enter up to 20 words and a title to generate a printable word search grid. Custom size.

Education maker puzzle word search

20

Density of Everyday Objects – Online Will It Float?

Select common materials (wood, plastic, metals) and see density chart. Predict floating. Fun science.

Education density float physics

20

Country Dialing Code Quiz - Online Learn International Prefixes

Test yourself on international calling codes. Random country, type the code. Or reverse. Perfect for travelers.

Education dialing code international quiz

20

Class Attendance Tracker - Online Log Present / Absent Percentage

Track attendance for multiple subjects. Mark present/absent and see percentage. Data in localStorage. Simple student tool.

Education attendance student tracker

20

Random RSA/EC Key Pair Demo - Online Cryptographic Visualization

Generate a dummy RSA or EC public/private key pair for educational visualization. Shows key structure and ASN.1 dump. Not for production use.

Education cryptography EC key pair RSA

19

False Friends Language Quiz – Online English/Spanish etc.

Show a word and guess the correct translation, but watch out for false friends. Avoid embarrassment.

Education false friends language quiz

19

Mohs Hardness Scale Simulator – Online Scratch Test Demo

Drag a virtual mineral across common items to understand scratch hardness. Interactive learning for jewelers.

Education hardness mineral Mohs

19

Prime Factorization Calculator – Online Factor Tree

Enter a number and see its prime factors displayed as a tree. Visual math helper.

Calculator factor tree math prime factorization

19

Simple Sentence Diagrammer – Online Visual Grammar

Type a simple sentence and see a rudimentary Reed‑Kellogg diagram. Educational.

Education grammar sentence diagram visual

19

Prepositions of Place Practice – Online Drag to Correct

Drag words to the correct position in a sentence using in, on, at. Visual feedback.

Education ESL practice prepositions

19

Interactive Multiplication Chart – Online Highlight Patterns

Click cells to see patterns, highlight multiples. Visual way to learn multiplication. Print empty grid.

Education chart interactive multiplication

19

Fraction to Decimal Conversion Chart – Online Quick Reference

Interactive table showing common fractions and their decimal/percentage equivalents. Click to highlight.

Education chart decimal fraction

19

Simple Pendulum Calculator – Online Period & Length

Enter length or period to find the other. Visual swinging animation. Quick physics reference.

Calculator pendulum period physics

19

Projectile Motion Simulator – Online Launch Cannon

Adjust angle and initial speed to launch a projectile. See trajectory, range, max height. Interactive physics.

Education motion physics projectile

19

Element Discovery Story – Online Random History of Elements

Click to get a random element and a short story about its discovery and uses. Fascinating science.

Education discovery element story

19

Geometry Area Quiz – Online Calculate Triangle, Circle, etc.

Random shapes appear; compute the area mentally. Multiple choice. For middle schoolers.

Education area geometry quiz

19

Random Wikipedia Article Viewer - Online Learn Something Random

Fetches a random Wikipedia article summary via API. Read interesting facts. Simple knowledge discovery tool. No data collected.

Education article random Wikipedia

19

Periodic Table Quiz - Online Learn Element Symbols & Names

Quiz yourself on element symbols, names, and atomic numbers. Multiple modes: element to symbol, symbol to element. Score tracking. Great for chemistry students.

Education element periodic table quiz symbol

19

Math Worksheet Generator - Online Printable Drills for Kids

Generate printable math worksheets for addition, subtraction, multiplication, and division. Choose difficulty and number of problems. Answer key included.

Education generator math print worksheet

18

Circular Motion Calculator – Online Find Period, Speed, Force

Enter any two of radius, mass, speed, period, force to find the others. Physics student aid.

Calculator calculator circular motion physics

18

Electrolysis Time Calculator – Online Faraday's Law

Calculate the time needed to deposit a certain mass of metal using current. Chemistry lab tool.

Calculator calculator electrolysis Faraday

18

Guess the Idiom Game – Online Literal vs Figurative

See a literal illustration of an idiom and guess the phrase. Fun for English learners.

Education English game idiom

18

Dog Breed Group Sorting Game – Online Drag to Category

Drag dog breed names into the correct AKC group (herding, sporting, etc.). Learn breed categories.

Education dog breed group quiz

18

Tree Leaf Identification Key – Online Shape, Margin, Arrangement

Select leaf characteristics (simple/compound, smooth/toothed) to identify common North American trees.

Education identification leaf tree