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Learning & Reference
313 appsLearning & Reference: Reading & Words
Grade 4 Writing Checker
Check if your sentences and word choices are friendly for a typical fourth-grade reader.
Kids Readability Checker
See how easy your writing is to read and spot words that may slow a young reader down.
Reading Choice Quiz Maker for Kids
Turn a short reading passage into a path with answers, clues, and feedback.
Simple Word Checker
Check whether a word is on the list of words most fourth graders know.
Tricky Word Finder
Find the less familiar words in a story, lesson, or note so you know what to explain.
Learning & Reference: Early Reading
Alphabet Flipbook Maker for Kids
Pick a starting letter and turn through six big letter-and-word pages.
Early Reader Checker
Check a short passage against familiar words used by children who are learning to read.
Easy Sentence Builder
Build short practice sentences from familiar early-reader words.
First Reader Word Checker
Check one word at a time to see if many beginning readers may know it.
Reading Practice Maker
Turn a few familiar words into quick read, find, and write practice cards.
Learning & Reference: Vocabulary & Words
Dictionary Teamwork Explorer for Kids
See how volunteer editors and contributors worked together on a word.
Friendly Dictionary for Kids
Look up a familiar word and read clear meanings, examples, and close words together.
Human-Edited Word Meanings for Kids
Open up one word and see the different ideas that can share its spelling.
Kid Thesaurus
Find familiar words connected to your idea without ads, accounts, or tricky definitions.
Multiple Word Meaning Finder for Kids
See how one spelling can have several meanings, like bat, spring, or play.
Opposite Word Finder for Kids
Find an opposite word and see the exact meaning that makes the pair work.
Parts of a Thing Explorer for Kids
Look inside a thing and name the smaller pieces that help make it whole.
Poetry Word Bank for Kids
Make short, medium, and long word lists around one idea for your next poem.
Simple Word Swap Finder for Kids
Turn a long word into shorter choices that may be easier to read and explain.
Simple WordNet Dictionary for Kids
Look up a familiar word and see its meanings, examples, and close words in one clear place.
Specific Word Kinds Explorer for Kids
Start with a broad group and discover more exact kinds inside it.
Stronger Word Finder for Kids
Find longer, more colorful word choices for stories, poems, and school writing.
Synonym by Meaning Finder for Kids
Read the meaning first, then pick a close word that says the same idea.
Synonyms by Definition for Kids
Read one definition, then find close words that match that exact idea.
Vocabulary Flipbook Maker for Kids
Add six words and make a page-turning book with simple meanings or drawing prompts.
Vocabulary Ladder Maker for Kids
Follow a playful chain where every new word connects to the word before it.
Whole and Part Word Explorer for Kids
Start with one part and find a larger whole that may contain it.
Word Category Ladder for Kids
Climb from one exact word to the bigger groups it belongs to.
Word Example Sentence Finder for Kids
Find real example sentences and see the meaning connected to each one.
Word Meaning Count Comparer for Kids
Put two words side by side and compare their meanings, jobs, and examples.
Word Relationship Map for Kids
Put one word in the middle and explore its groups, kinds, parts, and close words.
Word Web Maker for Kids
Put one word in the middle and build a clear web of connected ideas around it.
Learning & Reference: Phonics & Rhymes
Alliteration Word Finder for Kids
Find familiar words that begin with the same sound for silly sentences and poems.
First and Last Sound Finder for Kids
Slow a word down and see the speech sound at its beginning and at its end.
Homophone Finder for Kids
Find familiar words that sound the same but may have a different spelling or meaning.
Poetry Meter Checker for Kids
Turn one short poetry line into a clear pattern of strong and soft syllable beats.
Pronunciation Decoder for Kids
Turn dictionary sound codes into short, friendly chunks you can read from left to right.
Rhyme Finder for Kids
Find familiar words with the same ending sounds for poems, songs, and word games.
Rhyming Pair Checker for Kids
Check two words and learn whether their last strong vowel and ending sounds match.
Syllable Clapping Practice
Type one word and get a big clap marker for every vowel beat you should hear.
Syllable Counter for Kids
Count the vowel beats in a short sentence and see the count for every word.
Word Stress Finder for Kids
See which syllables have a strong beat and which syllables have a softer beat.
Learning & Reference: Math Learning
Combination Counter for Kids
Find how many different groups you can choose when the order does not matter.
Factorial Explorer for Kids
See how a factorial multiplies a whole number by every smaller positive number.
Fraction Simplifier for Kids
Reduce a fraction to its simplest form and see the number used to divide it.
Goldbach Prime Pairs Explorer
Split an even number into two prime numbers and discover a famous math pattern.
Greatest Common Factor Finder for Kids
Find the biggest whole number that divides two numbers with nothing left over.
Least Common Multiple Finder for Kids
Find the first positive number that two whole numbers both divide evenly.
Mean, Median, and Mode for Kids
Check a short number list and see its mean, median, mode, and range together.
Number to Words for Kids
Turn a number into clear English words for homework, checks, and reading practice.
Prime Factor Tree Maker
Break a number into the small prime numbers that multiply to make it.
Prime Number Checker for Kids
Check whether a whole number is prime and see every factor that divides it evenly.
Learning & Reference: Math Writing
Equation Editor for Kids
Type fractions, roots, powers, and full equations with a friendly math keyboard.
Fraction Builder for Kids
Build neat stacked fractions and combine them with plus, minus, and times signs.
Math Symbol Keyboard for Kids
Find and type common math symbols without hunting through a computer keyboard.
Printable Equation Sheet Maker
Type a clean math problem, add a title, and print a simple practice page.
Learning & Reference: Handwriting Practice
Handwriting Practice Sheet Maker
Type a short sentence and print lined rows for tracing and copying practice.
Handwriting Stroke Animator for Kids
Watch simple capital A, M, and S strokes draw in a helpful order for practice.
Name Tracing Sheet Maker
Type a name and make a simple practice page with large, easy-to-trace letters.
Learning & Reference: Music Learning
Arpeggio Direction Explorer for Kids
Compare an arpeggio that climbs, falls, or makes wide jumps.
Arpeggio Pattern Player for Kids
Break a chord into single notes and compare playful note patterns.
Call-and-Response Melody Maker for Kids
Hear four call notes, then make four notes that answer them.
Chord Strum Explorer for Kids
Hear one chord from low to high, high to low, or all together.
Easy Melody Practice
Follow a short row of notes and practice a tiny song at your own speed.
Instrument Family Sampler for Kids
Hear keys, strings, brass, and woodwinds side by side with big sound cards.
Instrument Range Explorer for Kids
Choose an instrument and hear three notes across its useful pitch range.
Major and Minor Chord Listener for Kids
Pick a starting note and hear how major and minor chords differ.
Major Scale Piano Step Trainer for Kids
Play C, G, or F major one correct step at a time on the touch piano.
Melody Pitch Transposer for Kids
Shift every note in a local melody by the same amount while its rhythm stays steady.
Note Length Listener for Kids
Hear the same sampled instrument play a short, medium, and long note.
Octave Pitch Shift Explorer for Kids
Hear exactly what one octave down, one octave up, and a wide jump sound like.
Piano Chord Shape Trainer for Kids
Build clear major and minor chord shapes by finding all three piano notes.
Piano Note Frequency Finder
Tap any piano key to see its note name and frequency in hertz.
Piano Note Name Practice for Kids
See a note name like C4 or F sharp, then find it on the touch piano.
Pitch Up-or-Down Listener for Kids
Hear an original and changed sound take turns, then listen for the direction.
Semitone Pitch Step Explorer for Kids
Move a sound one, three, or five keyboard steps and see its exact pitch factor.
Sight-Reading Piano Practice for Kids
Look at one clear staff note, then find and play it on the piano.
Soft and Loud Instrument Listener for Kids
Compare one instrument played softly, in the middle, and strongly.
Learning & Reference: Science Labs
Ball Drop Physics Lab
Drop bright balls onto ramps and see how gravity guides every roll and bounce.
Common Molecule Explorer for Kids
Explore the shapes behind caffeine, sugar, aspirin, vitamin C, and more.
Molecular Formula Finder
Draw a molecule from SMILES and find its molecular formula in one clear step.
Molecule Coloring Page Maker
Make a clean black-and-white molecule picture to print, trace, or color.
Molecule Structure Drawer
Turn a short chemistry code into a clear picture of atoms and bonds.
Learning & Reference: Feelings & Emoji
Learning & Reference: Emoji Word Play
Learning & Reference: Citations & Research
Learning & Reference: Culture & Dates
Chinese Lunar Date Converter
Turn a Gregorian date into its Chinese lunar date, zodiac year, and solar term.
Chinese Zodiac Finder
Find the Chinese zodiac animal and traditional year name for any birthday.
Prayer Times Calculator
Calculate daily Islamic prayer times from a date, location, and trusted calculation method.
Qibla Direction Finder
Find the compass direction toward the Kaaba from any latitude and longitude.
Learning & Reference: Sky & Science
Equinox & Solstice Calculator
Find the exact equinox and solstice times that mark the four astronomical seasons.
Moon Phase Finder
See the Moon's phase, illumination, and the next four quarter phases for any date.
Next Eclipse Finder
Find the next solar and lunar eclipses after any date with their type and peak time.