Blockchain Essentials: Crash Course on the Technology

From 31.42 £ /h

in progress for now
A blockchain is a type of distributed ledger technology (DLT) that consists of growing list of records, called blocks, that are securely linked together using cryptography. Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data (generally represented as a Merkle tree, where data nodes are represented by leaves). The timestamp proves that the transaction data existed when the block was created. Since each block contains information about the previous block, they effectively form a chain (compare linked list data structure), with each additional block linking to the ones before it. Consequently, blockchain transactions are irreversible in that, once they are recorded, the data in any given block cannot be altered retroactively without altering all subsequent blocks.

Location

Online from Turkey

Age

Teenagers (13-17 years old)

Adults (18-64 years old)

Student level

Beginner

Intermediate

Advanced

Duration

30 minutes

60 minutes

The class is taught in

English

Russian

Turkish

Skills

Information technology

Business management

Computer science

Availability of a typical week

(GMT -05:00)

New York

Online via webcam

Mon

Tue

Wed

Thu

Fri

Sat

Sun

00-04

04-08

08-12

12-16

16-20

20-24

Robert

4.71

(24)

As a Franco-Belgian management teacher, I give Excel lessons with passion!
Whether remotely or face-to-face, I offer many examples and exercises to accompany you.
I travel without problem throughout the region of Brussels and its surroundings, for lessons of at least 2 hours. For France, courses are only given remotely.

Here are some key words that will be covered in my classes:
Scenario analysis, Year, Rounding, Today, Bdnb, Bdnbval, Bdsum, Search, Column, Copy/paste in values, Copy/paste with transposition, Consolidation, Date, Datedif, Determat, Dollar, Right, Righterg, Equiv, Esterror, Estna, Frequency, Filter (simple and advanced), Format of cells, Left, Large.Value, Printing of documents, Index, Indirect, Inversemat, Day, Weekday, Line, Matrix, Max, Maxa, Max.Si, Min , Mina, Mina.If, Formatting of cells and ranges, Month, Average, Average.If, Nb, Nb.If, Nbval, Naming of cells and ranges, No, Small.value, Product, Productmat, Protection of cells, Lookup (Lookup), Lookupv (VLookup), Lookuph (HLookup), If (If), If.Not.Disp, If.Conditions, Iferror, Sum, Sumproduct, Sum.If, Sum.If.Set, Substitute , Pivot tables, Sorting, Cell locking

Do not hesitate to contact me to organize your lessons according to your needs and availability. Together, we will develop your Excel skills in an efficient and personalized way.

Cami

4.71

(24)

➤ Being a good manager is also being a good communicator. After all, a strategy can only be put into practice if you show yourself capable of interacting with your employees, of being a source of inspiration for them and of listening to their concerns. Unfortunately, not all managers naturally excel in this role and their difficulties in asserting themselves as true leaders is often attributable to their difficulties in communicating.

➤ The objective would then be to explore together the areas of improvement in terms of communication know-how. And managing effectively requires specific and advanced know-how.

➤ In fact, managerial communication corresponds to the interactions between the management of the company and the organization and more specifically, between the manager and his team. This executive is in charge of transmitting information and directives from higher hierarchical levels, supporting internal communication, distilling messages related to his own management to obtain the commitment of his team, all while transmitting a message effectively.

➤ This exercise can therefore be tricky: this is why it is important to choose the right mediator in order to be well supported, not only to be understood by those around him, but also to carry out his mission.

➤ What to communicate? When ? Whose ? These questions will find an answer in the consistency of the actions undertaken. Good managerial communication will thus aim to exchange / dialogue effectively with its employees, maintain a close link between the different layers of the company, bring human relations back to the heart of the company, establish a climate of trust and good team cohesion, motivate by inspiring.

➤ In short, each session combines techniques & practice exercises adapted to your everyday situations (filmed with your agreement in order to be reviewed, commented on, decoded together live), so that you can put them into practice immediately, and this from the 1st session.

Statistically, the progression following these private sessions is quickly noticeable, from 2 or 3 sessions *. (* study 2020).

➤ THE TRAINER:
Trained in Grande Ecole post-preparatory classes & Ivy League university in the United States, our teacher has specialized and has been working for more than 15 years, in Europe and North America, in the field of communication , in reputable international public and private establishments, intervening in forums and conferences, and oriented on two axes: training and coaching, with pedagogy and careful methodology as key words.

➤ PLACE, TIMETABLE, PRICES
- Locations: Geneva-Lausanne-Friborg-Zurich-Neuchâtel-Lugano-Montreux-Bâle-Neuchâtel-Berne-Lucerne-Bruxelles-Luxembourg-Paris-Lyon. But currently and until further notice, only by videoconference in accordance with national recommendations on Covid, this format also unanimously suitable for those accompanied.

-Apart from the classic advantages of videoconferencing (time savings related to travel, eco-responsibility, increased scheduling flexibility, etc.), the quality of the session & the interaction remain the same. In addition, the notes taken during the sessions are immediately transcribed on the session chat and are automatically transmitted to you so that you can browse them during and after the session if you wish.

- Hourly fees: To support each other and to be pleasant to you in this period of covid19 and in a spirit of solidarity, the fees have been temporarily reduced. But this fixed price will not increase after the start of the sessions.

-Sessions in English / French

-As other people do regularly, you can also please your loved ones by offering gift vouchers available all year round.

-Program: adapted to each need

Antonin

4.71

(24)

Need a catch-up, tutoring, private lessons or help with homework in mathematics? In computer science ? In logic?
I'm here for you!
I offer you a personalized approach; because there is no one method that works for everyone, I adapt to the needs and requests of each student (and their parents). The first hour of class will be used to define the student's needs, deadlines and strengths.
My courses are aimed at secondary school students of all levels, higher education students and anyone wishing to refresh or strengthen their knowledge of mathematics and computer science. I have been helping friends and acquaintances on a voluntary basis for a long time in the success of their studies and I hope to be able to put this experience to the benefit of your success :)

Camille

4.71

(24)

➤ Being a good manager is also being a good communicator. After all, a strategy can only be put into practice if you show yourself capable of interacting with your employees, of being a source of inspiration for them and of listening to their concerns. Unfortunately, not all managers naturally excel in this role and their difficulties in asserting themselves as true leaders is often attributable to their difficulties in communicating.

➤ The objective would then be to explore together the areas of improvement in terms of communication know-how. And managing effectively requires specific and cutting-edge know-how.

➤ In fact, managerial communication corresponds to the interactions between the management of the company and the organization and more specifically, between the manager and his team. This manager is in charge of transmitting information and directives coming from higher hierarchical levels, supporting internal communication, distilling messages related to his own management to obtain the commitment of his team, all while transmitting a message effectively.

➤ This exercise can therefore be tricky: this is why it is important to choose the right mediator in order to be well supported, not only to be understood by those around him, but also to carry out his mission.

➤ What to communicate? When ? Whose ? These questions will find an answer in the consistency of the actions undertaken. Good managerial communication will thus aim to exchange / dialogue effectively with its employees, maintain a close link between the different layers of the company, bring human relations back to the heart of the company, establish a climate of trust and good team cohesion, motivate by inspiring.

➤ In short, each session combines techniques & practice exercises adapted to your everyday situations (filmed with your agreement in order to be reviewed, commented on, decoded together live), so that you can put them into practice immediately, and this from the 1st session.

Statistically, the progression following these private sessions is quickly noticeable, from 2 or 3 sessions*. (*study 2022).

➤ THE TRAINER:
Trained in Grande Ecole post-preparatory classes & Ivy League university in the United States, our teacher has specialized and has been working for more than 15 years, in Europe and North America, in the field of communication , in reputable international public and private establishments, intervening in forums and conferences, and oriented on two axes: training and coaching, with pedagogy and careful methodology as key words.

➤ PLACE, TIMETABLE, PRICES
✓ Locations: Geneva-Lausanne-Fribourg-Zurich-Neuchâtel-Lugano-Montreux-Basel-Neuchâtel-Bern-Lucerne-Brussels-Luxembourg-Paris-Lyon. But currently, these sessions continue to be offered by videoconference in the current context and in accordance with general demand which is almost unanimous on this subject.

✓ Indeed, apart from the classic advantages of videoconferencing (time saving related to travel & their unforeseen events, eco-responsibility, increased schedule flexibility, etc.), the quality of the session & the interaction remain identical. In addition, the entire exchange, notes and recommendations are immediately transcribed on the dedicated chat.

✓ To support us among ourselves & to be pleasant to you in this sustainable / particular period and in a spirit of solidarity, the fees are temporarily reduced and will not increase after the start of our sessions.

✓ Languages: French/English.

✓ The progress following these private sessions is perceptible from 1 to 2 sessions (*2024 study).

✓ As other people do regularly, you can also please your loved ones by offering gift vouchers available all year round.

CONTACT / PROGRAM

✓ A la carte program: evaluated and adapted to each need.

Oussama

4.71

(24)

Learn to add AI features to your applications using ChatGPT API. Taught by a Full-Stack Engineer who's integrated AI into real client projects.

What You'll Learn:
ChatGPT API Integration: Add AI chat, content generation, or text analysis to any web app
Prompt Engineering: Write effective prompts that give consistent, quality results
Production Implementation: Rate limiting, cost management, error handling, security
Real-World Deployment: Deploy AI features to AWS with proper monitoring and logging

Technologies:
OpenAI API (ChatGPT-4)
React/Next.js frontend integration
Node.js/NestJS backend
Secure API key management
Cost optimization (don't waste money on API calls)

Perfect For:
Developers: Add AI to your portfolio (instant differentiation from other candidates)
Freelancers: Offer AI integration services
Students: Build an AI-powered projects that stands out
Entrepreneurs: Add AI features to your product without hiring an AI engineer

What We'll Build:
AI chatbot for your website (customer support, FAQ assistant)
Content generation tool (blog posts, product descriptions, social media)
Text analysis features (summarization, sentiment, keyword extraction)
Custom AI assistant for your specific use case

Real Examples:

E-commerce: AI product description generator
Real estate: AI property listing writer
Marketing: AI social media content creator
Education: AI study assistant

What's Included:
Working code you can deploy immediately
Cost management strategies (API calls can get expensive!)
Error handling and fallback strategies
Production deployment checklist

No AI experience needed - just basic JavaScript/React knowledge.

Ayoub

4.71

(24)

It is important to me to teach my students while adopting an active teaching method. I put all my experience acquired as a head teacher and also that of my academic career to the service of their success.

- Mathematics
- Chemical Physics,
- Technology.

My courses are aimed at students in the French system from 6th to 12th grade (Speciality: Mathematics, PC).

Baia

4.71

(24)

Code Your Ideas Into Reality 💻🚀
Want to build your own website or start a tech career? This class is perfect for absolute beginners who want to learn Python and use it to build real, working web apps with Django. You'll go from writing your first line of code to deploying complete projects - step by step, clearly explained, and handsOn.

✨ No experience needed.
🧠 Learn by doing - real apps, real logic.
🌍 Build skills for school, work, or freelance life.

Let’s turn your curiosity into code. First session gets you started!

Vincent

4.71

(24)

With over seven years of experience in teaching Computer Science & Information Technology (ICT), I have developed a strong expertise in delivering high-quality education across multiple internationally recognized curricula, including Cambridge IGCSE, GCSE, A-Levels, O-Levels, and Checkpoint. My passion lies in equipping students with coding, cybersecurity, and digital literacy skills, ensuring they are well-prepared for the evolving demands of the digital world.

Expertise & Teaching Areas:
✅ Programming & Software Development: Python, Java, C++
✅ Cybersecurity: Ethical hacking, data protection, network security
✅ Digital Literacy: ICT applications, online safety, cloud computing
✅ Data Science & AI: Data analysis, machine learning fundamentals
✅ Web Development: HTML, CSS, JavaScript

Curriculum & Pedagogical Experience:
🔹 Cambridge IGCSE & GCSE ICT & Computer Science – Teaching core and extended syllabi, focusing on programming logic, databases, and networking.
🔹 Cambridge A-Levels & O-Levels Computer Science – Preparing students for advanced computing concepts, problem-solving, and algorithm development.
🔹 Cambridge Checkpoint ICT – Building foundational skills in digital technology and computer applications.

Professional Impact:
📌 Mentored students to achieve top grades in Cambridge ICT & Computer Science exams.
📌 Developed interactive lesson plans integrating real-world applications of technology.
📌 Conducted coding boot camps and cybersecurity workshops to enhance practical learning.
📌 Guided students in project-based learning, including app development and website design.

With a strong commitment to student-centered learning and technological innovation, I am dedicated to shaping future tech leaders and empowering learners with skills relevant to careers in technology, data science, and software development.

Dr.Ibrahim

4.71

(24)

This course introduces students to the fundamental concepts, functions, and practices of management within organizations. Emphasizing both theory and real-world applications, the course covers the core management functions: planning, organizing, leading, and controlling. Students will explore topics such as strategic decision-making, organizational structure, leadership styles, communication, team dynamics, and performance management. Through case studies, discussions, and practical activities, students will gain a foundational understanding of how effective management contributes to organizational success. This course prepares learners for further studies in business and management, as well as entry-level leadership roles.

Dr.Ibrahim

4.71

(24)

This course introduces students to the fundamentals of Information and Communication Technology (ICT) and its role in modern society. Topics include computer hardware and software, digital communication tools, internet technologies, data management, cybersecurity, and emerging trends. Students will gain practical skills in using productivity software, conducting online research, and understanding the ethical and responsible use of digital resources. The course emphasizes both technical proficiency and digital literacy, preparing learners to confidently navigate and contribute to a technology-driven world.

Dr.Ibrahim

4.71

(24)

This course provides a comprehensive introduction to ISO standards and their practical application in business operations. Designed for professionals, managers, and organizations seeking certification or improvement, the program covers the fundamental principles of ISO, including quality management, risk assessment, process control, and continuous improvement.

Participants will learn how ISO standards such as ISO 9001 (Quality Management), ISO 14001 (Environmental Management), and ISO 45001 (Occupational Health & Safety) can be applied to strengthen business performance, ensure compliance, and meet international requirements. Through case studies, workshops, and interactive exercises, learners will gain hands-on knowledge of documentation, auditing, corrective actions, and best practices for sustainable success.

By the end of the program, participants will understand the key requirements of ISO standards, how to implement them effectively, and how to prepare for internal and external audits. This course is ideal for quality managers, compliance officers, team leaders, and business owners who want to achieve excellence, build customer trust, and gain a competitive edge in the global market.

Soufiane

4.71

(24)

Hello high school students! My name is Soufiane, Master's in Data Science & AI.

I offer 100% NSI (Digital Science and Technology) courses:
- Python (variables, functions, lists, dictionaries, OOP)
- Algorithms (sorting, searching, complexity, divide & conquer)
- Recursion (recursive functions, stacks, trees)
- Databases (SQL, relational models, queries)
- Architecture (systems, networks, protocols)
- Web (HTML/CSS/JS, Flask, client-server)
- Baccalaureate projects (subject 0, assessed mini-projects, clean code)
- Past papers & practice exams (2024/2025 step-by-step solutions) Objective: BAC NSI > 16/20 (written exam + project)
- Enhanced Parcoursup (specializations, engineering schools)
- Complete mastery of the program

Why me ?
100% interactive course: live coding, debugging...
Professional supports: algo sheets, Python/SQL templates, PDF reports
Flexible hours: evenings, weekends, holiday internships
At home (Cergy, Pontoise, Sarcelles – free within 15 km) or Zoom + screen sharing
Invoices issued

Limited places available (max 8 students). Contact me by message to schedule an appointment.
Respond quickly before the start of term! See you soon to ace your NSI exams!

Laith

4.71

(24)

Technology is everywhere, and understanding how it works and how to protect it can open doors to exciting opportunities. I’ve designed this course as a hands-on journey into networking, programming, and cybersecurity, where you don’t just learn theory, you practice real skills that matter in the digital world.

In this course, I’ll guide you through building and analyzing networks, writing programs with Python and other languages, and exploring how systems communicate and interact. You’ll dive into cybersecurity fundamentals, learn to identify vulnerabilities, understand how attacks happen, and practice defending systems like a pro.

Through interactive exercises, practical examples, and real-world scenarios, I’ll show you how hackers think, how organizations respond to threats, and how to secure systems effectively.

By the end of the course, you’ll have the confidence, knowledge, and hands-on experience to tackle networking, programming, and security challenges and apply these skills in your studies, career, or personal projects.

Nicolas

4.71

(24)

I am a dynamic and demanding teacher who gives private lessons in Physics-Chemistry as well as Mathematics.

I graduated from teaching seven years ago, after a masters in physical sciences with honors, and I teach in college and high school since.
I have also been preparing students for the Baccalaureate Science for many years, all of whom have been awarded very good honors.
I also prepare my students for different exams (Matu, Bac, preparation for EPFL, etc...)

I make sure to rework the basics so that the student can progress quickly. It is important to me that my students acquire a solid foundation of knowledge.
I also give effective work methods that will allow him to progress much more quickly and so he can regain self-confidence.

I can travel to the student's home or also conduct the lesson via Zoom/Google Meet.

Wissem

4.71

(24)

I teach coding to beginners and intermediate students.
Lessons focus on logic, basic programming, and practical exercises.
Classes are adapted to the student’s pace.
Students can choose between website or mobile app development.Hands on dev

➤ Being a good manager is also being a good communicator. After all, a strategy can only be put into practice if you show yourself capable of interacting with your employees, of being a source of inspiration for them and of listening to their concerns. Unfortunately, not all managers naturally excel in this role and their difficulties in asserting themselves as true leaders is often attributable to their difficulties in communicating.

➤ The objective would then be to explore together the areas of improvement in terms of communication know-how. And managing effectively requires specific and cutting-edge know-how.

➤ In fact, managerial communication corresponds to the interactions between the management of the company and the organization and more specifically, between the manager and his team. This manager is in charge of transmitting information and directives coming from higher hierarchical levels, supporting internal communication, distilling messages related to his own management to obtain the commitment of his team, all while transmitting a message effectively.

➤ This exercise can therefore be tricky: this is why it is important to choose the right mediator in order to be well supported, not only to be understood by those around him, but also to carry out his mission.

➤ What to communicate? When ? Whose ? These questions will find an answer in the consistency of the actions undertaken. Good managerial communication will thus aim to exchange / dialogue effectively with its employees, maintain a close link between the different layers of the company, bring human relations back to the heart of the company, establish a climate of trust and good team cohesion, motivate by inspiring.

➤ In short, each session combines techniques & practice exercises adapted to your everyday situations (filmed with your agreement in order to be reviewed, commented on, decoded together live), so that you can put them into practice immediately, and this from the 1st session.

Statistically, the progression following these private sessions is quickly noticeable, from 2 or 3 sessions*. (*study 2022).

➤ THE TRAINER:
Trained in Grande Ecole post-preparatory classes & Ivy League university in the United States, our teacher has specialized and has been working for more than 15 years, in Europe and North America, in the field of communication , in reputable international public and private establishments, intervening in forums and conferences, and oriented on two axes: training and coaching, with pedagogy and careful methodology as key words.

➤ PLACE, TIMETABLE, PRICES
✓ Locations: Geneva-Lausanne-Fribourg-Zurich-Neuchâtel-Lugano-Montreux-Basel-Neuchâtel-Bern-Lucerne-Brussels-Luxembourg-Paris-Lyon. But currently, these sessions continue to be offered by videoconference in the current context and in accordance with general demand which is almost unanimous on this subject.

✓ Indeed, apart from the classic advantages of videoconferencing (time saving related to travel & their unforeseen events, eco-responsibility, increased schedule flexibility, etc.), the quality of the session & the interaction remain identical. In addition, the entire exchange, notes and recommendations are immediately transcribed on the dedicated chat.

✓ To support us among ourselves & to be pleasant to you in this sustainable / particular period and in a spirit of solidarity, the fees are temporarily reduced and will not increase after the start of our sessions.

✓ Languages: French/English.

✓ The progress following these private sessions is perceptible from 1 to 2 sessions (*2024 study).

✓ As other people do regularly, you can also please your loved ones by offering gift vouchers available all year round.

CONTACT / PROGRAM

✓ A la carte program: evaluated and adapted to each need.

Oussama

4.71

(24)