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Learn: Courses

Short free courses on new and advanced topics, written for young learners. Every lesson is short and has something to try.

Planned courses

Coding and data Coming soon

Start with simple steps, then sort, count and draw charts from real-looking data.

How AI works Coming soon

What a model is, how it learns from examples, and where it goes wrong, with small things to try.

Space and the sky Coming soon

Find the planets tonight, measure the Moon, and learn how we know how far away stars are.

Climate and energy Coming soon

Weather, carbon and clean energy, worked out with your own numbers.

Money basics Coming soon

Saving, interest and budgets, explained with calculators you can play with.

Thinking like a scientist Coming soon

Asking a question, measuring, uncertainty and fair tests.

Tools the courses will use

Sky tonight #13 For your place and date: sunset, when it gets properly dark, the Moon's phase and rise and set times, where each planet is, and the best galaxies, clusters and nebulae for your eyes, binoculars or telescope. Publication plot maker #27 Paste columns or open a CSV or Excel file and get a clean scientific figure with error bars, sized for a journal column. Download vector SVG or PDF, or PNG at 300 or 600 dpi. Your data stays in your browser. CSV profiler and SQL playground #38 Open CSV, TSV or Excel files and get a profile of every column: type, missing values, distinct values, range and most common values. Then query them with SQL (SQLite), join files, and download the result. Nothing is uploaded. Budget planner #10 Work out what a trip, project or event will cost and how much to save each month, or plan your monthly budget with weekly and yearly bills, and see your savings grow. Tree carbon calculator #161 Estimate the carbon and CO₂ stored in trees, and how much they take up each year. Enter each tree's trunk diameter (DBH) and height, an allometric equation for your species, a root-to-shoot ratio and a carbon fraction. See biomass, carbon, CO₂e for every tree and in total, and yearly uptake from two measurements or a growth rate. Sample size and power calculator #32 How many subjects, samples or survey responses do you need? Sample size for comparing two means, paired data, two proportions, or a survey's margin of error, with power curves. Matches R and G*Power.

Learn follows the topics of the NCERT books used for Class 8 to 12 in India, so students can practise what they study at school. fibub is an independent free site, not part of NCERT, and it doesn't copy textbook text or pictures. Like every fibub tool, everything runs in your browser: no sign-up, nothing about you is saved.