免费在线课程

配有测验和抽认卡的精选课程

每门课程都经过精心规划，分为简短的课时，并配有测验和闪卡，让您学到的知识真正牢记于心。

浏览免费课程

选择一个主题并开始。每门课程都有课程内容、测验和抽认卡，帮助你真正学会并记住。

17 courses

Beginner friendly

Chemistry Essentials

Practise atoms, formulas, reactions, stoichiometry, bonding, gases, equilibrium, acids and bases, electrochemistry, organic chemistry, and nuclear chemistry.

262 questions116 flashcards15 modules

Nursing Pharmacology Essentials

Practise medication safety, adverse effects, monitoring, patient teaching, and major drug classes for nursing review.

251 questions198 flashcards11 modules

Beginner friendly

AP Statistics Practice

Study data, sampling, probability, inference, chi-square tests, and regression with AP-style practice.

190 questions155 flashcards9 modules

Beginner friendly

Psychology Essentials

Study research methods, the brain, learning, memory, development, personality, social psychology, stress, disorders, and therapy.

178 questions203 flashcards11 modules

Medical terminology

Beginner friendly

Medical Terminology Essentials

Practise word parts, body regions, plurals, abbreviations, and major body-system terminology for healthcare study.

150 questions149 flashcards10 modules

Beginner friendly

AI Risk Management Literacy

Learn trustworthy AI basics, NIST AI RMF functions, generative AI risks, monitoring, and practical risk decisions.

150 questions155 flashcards10 modules

Beginner friendly

Python for Data Analysis

Practise Python, pandas, NumPy, files, cleaning, grouping, joins, dates, plotting, and debugging common analysis mistakes.

146 questions161 flashcards10 modules

Beginner friendly

SQL for Analysts

Practise SELECT, filtering, joins, grouping, CASE, CTEs, window functions, transactions, and query debugging.

142 questions122 flashcards10 modules

Beginner friendly

Biology Essentials

Learn cells, macromolecules, metabolism, genetics, evolution, and ecology with source-backed practice.

126 questions162 flashcards10 modules

Beginner friendly

Anatomy & Physiology Essentials

Learn body organization, cells, tissues, major systems, and homeostasis with structured review and practice.

113 questions257 flashcards6 modules

Beginner friendly

Public Health Epidemiology Basics

Study disease frequency, risk measures, study designs, surveillance, screening, and outbreak investigation from CDC source material.

110 questions92 flashcards5 modules

Beginner friendly

Finance & Investing Basics

Learn saving vs investing, risk and return, diversification, fees, fraud red flags, and rate of return from government financial education sources.

90 questions109 flashcards6 modules

Beginner friendly

Cybersecurity Fundamentals

Practise cybersecurity risk, NIST CSF functions, access control, phishing response, backups, vendor risk, and safer operations.

86 questions71 flashcards5 modules

Beginner friendly

Microeconomics Essentials

Practise scarcity, supply and demand, elasticity, firm behaviour, market structures, externalities, and policy tradeoffs.

84 questions56 flashcards5 modules

Beginner friendly

Statistics Without Panic

Practise p-values, confidence intervals, significance tests, and the common mistakes that make results easy to misread.

72 questions53 flashcards3 modules

Beginner friendly

Calculus Essentials

Review limits, derivatives, graph interpretation, antiderivatives, integrals, and common calculus mistakes with worked-style practice.

52 questions52 flashcards5 modules

Beginner friendly

Probability Without Panic

Build confidence with sample spaces, conditional probability, Bayes, expected value, and common distributions.

24 questions75 flashcards4 modules

常见问题

这些课程真的是免费的吗？

是的。您可以免费打开课程，学习课时、测验、抽认卡和笔记。

这些免费课程适合哪些人？

任何想要学习的人。无论您是学生、想要温习某个主题，还是纯粹出于好奇，都可以打开课程立即开始。

包含哪些内容？

每门课程都包含结构化的课时、练习题和抽认卡，助您高效掌握并记住相关知识。

Ready to learn something today?

Pick any course above — no account needed to start.

浏览免费课程