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+5000
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+1000
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Vocabulary and Expressions in English
5
(13)
4h58m
15 exercises
Technical English for Engineers
5
(7)
20h10m
38 exercises
English Grammar Basics to Advanced
5
(23)
12h59m
33 exercises
English for Academic Purposes
4.9
(12)
65h01m
32 exercises
Accent Reduction and Pronunciation for English Learners
4.9
(10)
5h26m
13 exercises
English Grammar
4.9
(8)
5h49m
19 exercises
IELTS English Exam Lessons
4.8
(15)
9h34m
33 exercises
English listening practice
4.8
(39)
6h52m
26 exercises
Business english course
4.8
(440)
2h44m
20 exercises
English grammar
4.8
(356)
4h20m
18 exercises
English Grammar Rules
4.8
(4)
5h41m
6 exercises
English Advanced Vocabulary C1-C2
4.8
(4)
3h40m
12 exercises
English Pronunciation Course: Master All 44 IPA Sounds and Clear Speaking
4.8
(4)
1h21m
22 exercises
English Lessons for Beginners
4.7
(7)
12h05m
47 exercises
Learn English
4.7
(256)
23h29m
21 exercises
English lessons
4.6
(815)
7h04m
36 exercises
All 12 English Tenses (Complete Guide)
4.6
(8)
10h38m
17 exercises
English language course
4.6
(16)
12h44m
7 exercises
English grammar
4.6
(109)
3h42m
30 exercises
Business English Communication Skills for Work and Interviews
4.5
(2)
5h36m
1 exercises
Free CourseConvolutional Neural Networks for Computer Vision: Detection, Recognition
New
6h01m
26 exercises
Free CourseJasmine Testing Framework Course
New
8h45m
27 exercises
Free CourseMastering Jest in React – The Complete Testing Series
New
1h17m
10 exercises
Free CourseFrench Pronunciation Course: Master Vowels, Nasals and the French R
New
1h43m
21 exercises
Free CourseReactJS Course For Beginners
New
8h29m
17 exercises
Free CourseManagerial Accounting Complete Course
3.8
(6)
31h51m
42 exercises
Free CourseReact Hooks Tutorial
New
1h17m
2 exercises
Free CourseReact Basic Hooks
New
1h32m
12 exercises
Free CourseAll 12 English Tenses (Complete Guide)
4.6
(8)
10h38m
17 exercises
Free CourseJavaScript Objects and Prototypes In-depth
New
2h15m
13 exercises
Free CourseReact.js Unit Testing and Integration Testing Tutorial
New
3h36m
3 exercises
Free CourseEnglish Grammar for Beginners (A1) Complete Foundations Course
4.4
(9)
2h24m
23 exercises
Free CourseEnglish Pronunciation Course: Master All 44 IPA Sounds and Clear Speaking
4.8
(4)
1h21m
22 exercises
Free CourseCSS Complete Tutorial
5
(1)
8h30m
49 exercises
Free CourseComplete ECMAscript6 ES6 Course
New
5h58m
51 exercises
Free CourseUsing the Fetch API in JavaScript and ASP.NET Core
New
1h14m
6 exercises
Free CourseWorking
New
4h36m
19 exercises
Free CourseAsynchronous JavaScript: From Callbacks to Async/Await
New
2h05m
19 exercises
Free CourseMaster All 49 American English Sounds: Vowels and Consonants
New
7h39m
41 exercises
Free CourseEasy English Conversations for Beginners: Daily Life and Simple Questions
4.5
(8)
59m
13 exercises
Interactive tutorials
Describe and understand daily routines using Spanish reflexive verbs. Practice pronoun agreement, common stem changes, natural expressions for personal care, and pronoun placement with infinitives, then write a connected routine of your own.
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Use the French subjunctive to express emotion, doubt, and necessity with precision. Choose between the subjunctive, indicative, and infinitive, interpret nuanced expressions, and select the right tense in realistic communication.
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Learn to describe completed past events using the passé composé with avoir. Build affirmative sentences, negatives, and questions; use common irregular participles; handle object pronouns and agreement; and write a short account of what happened.
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Learn to greet someone, exchange names, ask how they are, and say goodbye in French. Practice short conversations and choose polite or casual expressions for everyday situations.
Start tutorial
Design, diagnose, and evaluate advanced RAG systems using an engineering-documentation case study. Make evidence-based decisions about indexing, hybrid retrieval, reranking, grounded generation, evaluation, security, and operational trade-offs. Exercises use supplied documents, traces, and small Python examples without requiring external services.
Start tutorial
Build and evaluate prompts that combine few-shot examples, clearly scoped roles, and structured reasoning. Practice with a self-contained support-triage case, learn when each technique helps, and assess outputs for accuracy, consistency, and unsupported claims. No coding or separate AI tool is required.
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Learn what AI is, how models learn from examples, and how they produce predictions or generated content. By the end, you will be able to explain a simple AI workflow, recognize common limitations, and choose practical checks for using AI responsibly.
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Use the Spanish imperfect subjunctive accurately in past reports, hypothetical conditions, wishes, and polite requests. Learn to choose forms and moods according to time, speaker perspective, and communicative intent, then apply them in a coherent Spanish message.
Start tutorialExercises
Test your knowledge of diabetes medications, including mechanisms, adverse effects, insulin profiles, and safe clinical use.
Start exercisesTest your ability to use a, an, the, and no article correctly in practical English sentences.
Start exercisesTest your knowledge of numerical differentiation, integration, ODE solvers, stability, convergence, and computational modeling.
Start exercisesTest your knowledge of patents, trademarks, copyrights, trade secrets, ownership, licensing, and IP protection for new ventures.
Start exercisesTest your ability to identify causal flaws, confounders, alternative explanations, and evidence that strengthens causal conclusions.
Start exercisesTest your knowledge of ZIP archives, lossless compression, extraction, compression ratios, multipart files, and archive safety.
Start exercisesThousands of online courses in video, ebooks and audiobooks.
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Download our app via QR Code or the links below:.
Common Logical Fallacies: How to Spot Bad Arguments in Everyday Life
Learn to recognize common logical fallacies, from ad hominem to straw man, with clear examples and simple tips for better reasoning.
Stoicism for Beginners: Core Ideas and How to Apply Them Today
Stoicism teaches us to focus on what we can control. Meet its key ideas, thinkers and simple exercises for everyday life.
Mitosis vs. Meiosis: Two Ways Cells Divide and Why the Difference Matters
Mitosis makes identical body cells; meiosis makes unique sex cells. Learn the stages, the key differences and why both processes matter.
The Piano Pedals Explained: What the Sustain, Soft and Sostenuto Pedals Really Do
Learn what each piano pedal does, how to use the sustain pedal cleanly, and which common mistakes to avoid as a beginner.
Rate Limiting Explained: How APIs Protect Themselves from Too Many Requests
What rate limiting is, why APIs use it, how common algorithms work, and what the HTTP 429 status code means for developers.
The Sunk Cost Fallacy: Why We Keep Investing in Things That Aren’t Working
Learn what a sunk cost is, why it distorts our decisions, and a simple test for deciding when to keep going and when to walk away.
How to Build a Content Calendar as a New Creator: A Simple Weekly System
Learn how to build a simple content calendar as a new creator: choose pillars, plan formats, batch your work and review results without burning out.
Irrigation Methods for Small Farms: Drip, Sprinkler and Surface Systems Compared
Compare drip, sprinkler and surface irrigation for small farms, with pros, cons and tips for choosing a system that saves water and supports healthy crops.
Nowadays, the internet offers a wide range of free courses for those who want to improve their qualifications and, consequently, increase their knowledge and even guarantee better opportunities in the job market. However, it is necessary to be careful not to fall into holes and end up wasting time.
First, think of a course on any topic. Now imagine being able to do it without paying anything for it – not even for the certification at the end of it. That's what you find at Cursa, a project focused on offering free courses and content through the website and application available for iOS and Android.
As mentioned above, Cursa courses are not only available in the most varied segments – but also completely free and online. You can still do them any day or time of day, depending solely on your availability.
That's what you read. Want to become an entrepreneur? Learn to do complicated math? Want to improve your writing? Learn to program? Improve skill with spreadsheets?
Having decided that, go to the Cursa app or website to check the available course options and start yours as soon as possible. With Cursa you not only take the courses but leave with the certification in hand.
To take a free online course, the first step is to decide what you want to learn.
And there's more: if you can't decide between one topic or another, you can also start with a knowledge trail. Trails are currently available with diverse content for those who: want to make an extra income or start a new venture in the comfort of their own home, work as an operator or inspector in supermarkets, become a Front End or software developer or want to start a business, but don't even know where to start.
At Cursa you will find courses to increase your professional qualification even if you are unemployed, since the courses are free and even certified. In this way, you can take advantage of your free time to study and can also include them in your resume, increasing your chances of getting a good job in the job market.
Not sure what to choose? Cursa offers a wide range of courses in the areas of computers, languages, high school, management and business, health, music, law, art and design and so on.
About
After completing the course you will have free access to the digital certificate of course completion.
How to get it for free: It is only possible to issue the certificate in our application, which can be downloaded from Google Play or App Store, so you can take the online course here and use the app only to issue the certificate. Being that you can also take the courses through the app if you wish.
In digital format: After completing the course and generating the certificate through the application, the image of the same will be generated in the photo gallery of your cell phone and will also be sent to your email.
Why the certificate is important: You can use it to improve your resume, to rise in careers or positions, to enrich your knowledge and among several other applications.
See more about the Certificate
Carry knowledge in your pocket.
Download the Cursa app.
There are hundreds of free courses available, with a free certificate of completion that is saved in your mobile image gallery.
Download the app to access the Course Completion Certificate for Free.
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