Lesson 6: Functions, Parameters and Return Values in JavaScript
What happens when the same discounted-price calculation appears in five different places, and the discount rate changes? Open Full Article...
Introduction Courses
Explore Introduction Courses | Lenara Learning
Introduction Courses brings together accessible online courses for subjects that may be unfamiliar, technical or rapidly developing. Learners can explore cyber security, JavaScript, vibe coding, prompt and context engineering and other focused areas, beginning with essential ideas and vocabulary before moving towards more detailed study.
Each course is designed to build confidence without assuming advanced knowledge. Clear explanations, supplied examples and carefully ordered lessons show how ideas connect across a complete subject. Learners can revisit difficult sections, compare concepts and develop understanding at a pace that suits their experience.
Strong introductory study also develops reasoning. Learners are encouraged to ask what a tool or method does, how a claim is supported, which assumptions are being made and where errors or risks may occur. This helps them become thoughtful users of knowledge rather than simply memorising terminology.
The collection supports home education, home schooling, revision and independent online learning for older children and teenagers. Parents can use it to identify suitable starting points, while learners can follow a full online course or explore individual lessons before choosing their next area of study.
Browse the courses below to start learning.
Lesson 6: Networks, Internet Traffic and Common Attack Routes
What connects a phone in a bedroom to a printer in a school, or to a server on another continent? Open Full Article...
Lesson 7: Arrays and Working with Collections in JavaScript
Why keep three scores in three separate variables when they belong to one set? Open Full Article...
Lesson 7: Firewalls, Filtering and Network Defence
An organisation’s network may receive thousands of connection attempts while still needing to provide email, online services and access to shared… Open Full Article...
Lesson 8: Objects and Structured Data in JavaScript
How could a programme know that 91 is a science score rather than just the fourth item in a list? Open Full Article...
Lesson 8: Encryption, Hashing and Protecting Data
What if a stolen laptop contained thousands of readable customer records, or an intercepted message could be quietly changed before it arrived? Open Full Article...
Lesson 9: Modern JavaScript Functions and Array Methods
What changes when a familiar function is written with an arrow instead of the word `function`? Open Full Article...
Lesson 9: Updates, Backups, Permissions and System Security
How can two identical computers face the same malware threat yet have very different outcomes? Open Full Article...
Lesson 10: JavaScript and the Web Page DOM
How can a line of JavaScript change a heading that began as plain text in an HTML file? Open Full Article...
Lesson 10: Cybercrime, Ethical Hacking and the Law
Two fictional people notice the same apparent weakness in a computer system: one has explicit permission from the organisation responsible for it… Open Full Article...
