nu: Lektionen

language arts

ABCs: Letters and Sounds

Meet the alphabet! Learn letters & the sounds they make.

general

Ancient Egypt: From the Nile to the Pyramids

Travel back 5,000 years to banks of the Nile & discover how one river built a civilization.

science

Animals: Who Lives Where?

Discover animals and their homes! From farms to oceans to jungles.

chemistry

Atoms & Elements: What Everything Comes From

Zoom into the atom & discover why the periodic table serves as the most powerful cheat sheet in science.

science

Cells: Building Blocks of Life

Discover how cells work: from membranes to mitochondria: and why every living thing depends on them.

environmental science

Climate Science: Evidence and Impact

Examine evidence for climate change, understand the mechanisms & evaluate what we can do about it.

art

Color Theory: Seeing Like an Artist

Learn how artists use color to create mood, depth, and meaning: from the color wheel to masterworks.

general

Colors and Shapes All Around

Find colors and shapes everywhere you look! A first lesson for little learners.

math

Counting: 1, 2, 3!

Count along with us! A first numbers lesson for little learners.

cs algorithms

Groß O: Wie schnell ist schnell genug?

Groß O-Notation beschreibt, wie sich der Kostenanstieg eines Algorithmus bei wachsenden Eingaben verhält. O(N) bedeutet, dass das Doppelieren der Eingabe auch das Doppelieren der Arbeit bedeutet. O(N²) bedeutet, dass das Doppelieren der Eingabe die Arbeit vielfacht. Dieses Lektionen baut Intuition für Groß O auf, indem es Programmierbeispiele, Vergleichstabelle und Hand-on-Kostenberechnungen verwendet — und verweist dann auf eine tiefergehende Einführung in unserem Unhamming-Kurs.

cs algorithms

Complexity Analysis: Best, Worst, & Average Case

Big O describes worst-case growth. Theta describes tight bounds. Omega describes best case. Space complexity tracks memory, not just time. Amortized analysis spreads occasional expensive operations across a sequence. This lesson builds the formal toolkit for analyzing any algorithm.

cs algorithms

Lists & Sets: Choosing the Right Tool

A list stores items in order. A set stores unique items for instant lookup. Choosing between them changes your program from O(N²) to O(N). This lesson builds intuition for when to reach for each data structure, how their Big O costs differ, & how to combine them to solve real problems.

cs algorithms

Patterns Everywhere: Your First Algorithm

Algorithms live everywhere: in how you sort your toys, find your shoes, or figure out the fastest way to eat your vegetables first. This lesson finds algorithms in everyday life, sorts by color & size, & discovers that some ways of searching work faster than others.

cs algorithms

Searching & Sorting: Faster Ways to Find Things

Linear search checks every item one by one. Binary search jumps to the middle & cuts the work in half each time. Bubble sort compares neighbors & swaps them. This lesson builds intuition for why organized data lets computers work faster — with hands-on examples using numbers & words.

biology

DNA: The Code of Life

Decode the molecule that builds every living thing: from bacteria to blue whales.

psychology

Feelings and Friends

Learn about feelings (happy, sad, mad, scared) & how to become a good friend.

math

Bruchzahlen: Von Pizza bis Algebra

Meistere Bruchzahlen durch Alltagsexemple: Pizza schneiden, Schokolade teilen und aufwärts zur Algebra.

math

Geometry: Area, Volume, and the Coordinate Plane

Calculate areas of 2D shapes, volumes of 3D solids, and plot points on the coordinate plane.

math

Geometrie: Linien, Winkel und Symmetrie

Erlerne Punkte, Linien, Strahlen, Winkel und wie du Symmetrie in Formen findest.

math

Geometry: Proofs, Transformations, and Trigonometry

Explore congruence, similarity, geometric transformations, and the foundations of trigonometry.

math

Geometry: Shapes Live Everywhere!

Find circles, squares, triangles, and rectangles in the world around you.

algebra

Linear Equations: Finding x

Learn to solve equations step by step: the foundation of all higher mathematics.

philosophy

Logic and Critical Thinking

Sharpen your mind with the tools philosophers have used for 2,500 years to find truth and spot nonsense.

music

Music Theory: Rhythm, Melody, and Harmony

Understand the building blocks of every song ever written: from Bach to Beyonce.

health

My Body: Head to Toes

Learn about your amazing body! From your head to your toes and everything in between.

physics

Newton's Laws: Forces in Motion

Understand the three laws that govern everything from falling apples to orbiting planets.

health

Nutrition: Fueling Your Body

Learn what food actually does inside you, & why the best diet works simpler than the internet makes it seem.

writing

The Persuasive Essay: Making Your Case

Learn to argue like a lawyer and write like a journalist: the art of changing minds with words.

geography

Plate Tectonics: The Moving Earth

Discover why continents drift, mountains rise, earthquakes shake, and volcanoes erupt: the engine beneath your feet.

language arts

Die unbegangene Straße: Robert Frost

Lesen und analysieren Sie das klassische Gedicht von Robert Frost über Entscheidungen und ihre Folgen.

statistics

Probability: Games of Chance

Learn the math behind luck: from coin flips to card games to predicting weather.

psychology

How Memory Works

Explore the science of remembering & forgetting, & learn why your brain proves both amazing & unreliable.

geometry

The Pythagorean Theorem: Right Triangles and Beyond

Discover a 2,500-year-old formula that connects geometry to the real world: from construction to GPS.

computer science

Python: First Steps

Write your first Python programs: print, variables, input, and logic.

music

Recorder: The Consort and the Baroque Voice

Master the recorder family, transposition, ensemble reading, Baroque ornamentation, and tuning, then carry that musicianship straight into a concert band woodwind section.

music

Recorder: Your First Three Notes

Learn to hold a recorder, blow gentle warm air, and play your first three notes: B, A, and G.

music

Recorder: Full Range and the Mountain King

Master the soprano recorder's full range, cross-fingering, articulation, breath, and the creeping accelerando of Grieg's 'In the Hall of the Mountain King'.

music