--- title: "Best Coding Classes in Armagh | Modern Age Coders" description: "Live online coding, Python, AI and maths lessons for Armagh learners aged 6 to 67, and in Richhill, Markethill and Keady too. The first lesson is completely free." canonical: https://learn.modernagecoders.com/best-coding-class-in-armagh source: src/pages/best-coding-class-in-armagh.html --- > Live online coding, Python, AI and maths lessons for Armagh learners aged 6 to 67, and in Richhill, Markethill and Keady too. The first lesson is completely free. Skip to contentCourse picks for Armagh ## Four courses for the observatory city Choose the course closest to what the learner already enjoys. All four open with a free live lesson that needs no payment details. [![Scratch Coding for Kids course thumbnail](/images/scratch-kids.webp)Ages 6 to 12Scratch Coding for KidsBlock programming for younger children, a first step towards programs that sort a list and spot what is out of place.See the syllabus](/courses/scratch-programming-complete-course)[![Python for Teens course thumbnail](/images/python-teens.webp)Ages 13 to 18Python for TeensPython from first lines to complete projects, enough to load a star catalogue and write merge sort from scratch.See the syllabus](/courses/python-complete-masterclass-teens)[![Data Science for Teens course thumbnail](/images/data-science-teens.webp)Ages 13 to 18Data Science for TeensReal data in Python, including catalogues where the tidy-looking order hides surprises.See the syllabus](/courses/data-science-course-for-teens-python-data)[![Python Automation Course course thumbnail](/images/python-college.webp)University and adultPython Automation CoursePython for adults who handle large lists and records and need fast, correct ways to sort and compare them.See the syllabus](/courses/python-ai-automation-masterclass-college) Browse the [course atlas](/course-atlas) for more than one hundred options and use the [coding roadmap](/coding-roadmap) to check prerequisites. The four we are known for ### Python, AI, vibe coding and agentic coding These run underneath everything above. Every one is live and online, placed by ability rather than by age, and the first class is free. [![Vibe Coding for Teens course thumbnail](/images/vibe-coding-teens.webp)Vibe codingAges 13 to 17Vibe Coding for TeensPython, web and AI projects where the learner still owns the thinking.See the syllabus](/courses/vibe-coding-for-teens-python-web-ai-projects-course)[![Python Automation Course course thumbnail](/images/python-college.webp)Python and AICollege and adultPython Automation CourseAutomate the work you already do, then let AI carry part of it.See the syllabus](/courses/python-ai-automation-masterclass-college)[![AI and Machine Learning for Teens course thumbnail](/images/ai-ml-teens.webp)AI and MLAges 14 to 18AI and Machine Learning for TeensTrain a model, read what it learned, and be able to say why it is wrong.See the syllabus](/courses/ai-ml-masterclass-teens)[![Codex & Claude Code course thumbnail](/images/codex-claude-code-adults.webp)Agentic codingProfessionalsCodex & Claude CodeRun AI coding agents on real work without losing control of the codebase.See the syllabus](/courses/codex-and-claude-code-ai-coding-agents-masterclass-for-adults-professionals)Armagh today ## A small city in a district of young families Census 2021 figures from the Northern Ireland Statistics and Research Agency for the Armagh settlement, the Armagh District Electoral Area and the Armagh City, Banbridge and Craigavon district. | Area | Usual residents | | --- | --- | | Armagh settlement | 16,310 | | Armagh District Electoral Area | 32,405 | | Armagh City, Banbridge and Craigavon | 218,656 | | Northern Ireland | 1,903,175 | ### Children In the district, 7.2% of residents were aged 10 to 14 and 7.1% aged 5 to 9 in 2021, against 6.7% and 6.5% across Northern Ireland. ### Young adults People aged 20 to 24 were 5.3% of the district, a little below Northern Ireland's 5.9%, and 14,175 residents were under five. ### Villages around the city Nearby settlements include Tandragee with 3,545 residents, Keady with 3,343, Richhill with 2,738 and Markethill with 1,912. Our Armagh groups bring the city and its villages together. A P5 child in Richhill might be building a first game, a Year 11 student in Armagh working towards CCEA GCSE Digital Technology, and an adult in Tandragee learning Python for work, each in a small group at the right level. The Observatory ## Stars and weather since the 1790s From Armagh Observatory and Planetarium's own history and weather pages. ### 1790 The Observatory opened, founded by Archbishop Robinson. Weather measurements began in 1794 and daily readings in 1795, and they have continued uninterrupted ever since. ### 6 January 1839 On the Night of the Big Wind, director Thomas Romney Robinson logged a "tremendous gale in the night", an event the Observatory says inspired his cup anemometer. ### 1882 onwards After Robinson's death on 28 February 1882, having served as director for 59 years, J.L.E. Dreyer, a Dane, took over and compiled the New General Catalogue of Nebulae and Clusters of Stars. The Observatory says Dreyer's catalogue is probably the single most important contribution to science to have come from Armagh, and that it remains the principal catalogue of nebulae and galaxies used by astronomers around the world. We have no connection with Armagh Observatory and Planetarium, Armagh City, Banbridge and Craigavon Borough Council or the OpenNGC project. The catalogue is on this page because it is a real, famous, carefully ordered list, which makes it the ideal test of how to measure order. Where the positions come from OpenNGC is a free database of the NGC and IC catalogues, released under a Creative Commons attribution share-alike licence, giving each object's modern position as right ascension and declination for the year 2000. Signature project ## How out of order is Dreyer's catalogue today? An inversion is a pair of items listed in the wrong order. Counting them measures how unsorted a list is: zero for a perfect order, and every possible pair for a list in reverse. | Measure | Result | | --- | --- | | Pairs to check one by one | 30,728,880 | | Comparisons made by merge sort | 63,917 | | Inversions, counting right ascension as a straight line | 359,626 | | Inversions, treating right ascension as a circle | 47,634 (0.155% of pairs) | | Typical distance from sorted position | 4 places | ### 1. Split and merge Merge sort splits the list in half, sorts each half and merges them. When an item from the right half jumps ahead of items still waiting on the left, each of those is one inversion. ### 2. Spot the wrap Right ascension runs from 0 to 24 hours and then starts again. NGC 7840 now sits at 0 hours 7 minutes, seconds away from NGC 1, so the last 40 entries look out of order when they are not. ### 3. Count by region Split the sky by declination and count again. Near the equator only 0.076% of pairs are inverted; south of minus 60 degrees it is 0.760%, and north of plus 60, 0.343%. ### A circle is not a line Our first count, 359,626, was almost entirely an artefact: 311,992 of those inversions came from 40 objects that had crossed midnight in right ascension. Nothing about the sky was wrong; the code had treated a circular quantity like a ruler. It is one of the most common mistakes with angles, times of day and dates across New Year, and the only cure is to think about what the numbers mean before trusting a count. Once the circle is handled, the pattern makes physical sense. The slow wobble of the Earth's axis shifts sky coordinates over the years, and right ascension shifts fastest close to the poles, where the lines of right ascension crowd together. The most displaced entry of all is NGC 2573, just 40 arcminutes from the south celestial pole: it now sits 1,923 places from where its modern right ascension would put it. Measuring order ## Five questions before trusting a sorted list Learned on Dreyer's catalogue, then used for search results, rankings of every kind, version histories and the checks that compare two recommendation lists. | Question | For the NGC | What goes wrong if you skip it | | --- | --- | --- | | What is the sort key? | Modern right ascension for each entry | Comparing positions from different eras | | Is the key circular? | Yes: 24 hours wraps to 0 | Hundreds of thousands of false inversions | | How fast is the count? | Merge sort, 63,917 comparisons | Tens of millions of checks for one number | | What counts as an entry? | The 7,840 plain NGC numbers | Sub-components counted twice | | Where is the disorder? | By declination band | A single average hiding the poles | The fourth row is a judgement call. OpenNGC also lists extra entries for objects that split into parts; we used only the 7,840 plain numbers so that each catalogue number counts once. A different choice would change the count slightly, and the honest report says which was used. ### Younger learners Lining up numbered cards, counting how many pairs are in the wrong order, and finding the quickest way to tidy them. ### Teenagers Merge sort in Python with an inversion counter, run on 7,840 real catalogue entries, with the circular right ascension handled properly. ### Adults Comparing orderings at work, from rankings to schedules, with keys, wrap-arounds and duplicates checked first. We are not connected with Armagh Observatory and Planetarium, the OpenNGC project, NISRA or Armagh City, Banbridge and Craigavon Borough Council. The catalogue data and census tables are published openly; the counts, unwrapping and band comparison on this page are our own work. Learning ladder ## From numbered cards to merge sort Treat the ages as a guide; the free lesson finds where each learner should start. Ages 6 to 10 ### Out of order Sorting numbered cards and counting the pairs that are in the wrong order along the way. [Scratch Coding for Kids](/courses/scratch-programming-complete-course)[Problem Solving and Computational Thinking for Kids](/courses/problem-solving-and-computational-thinking-for-kids)Ages 11 to 13 ### Sorting in code Writing simple sorts in Python and timing them on longer and longer lists. [Python and AI for Kids](/courses/python-ai-kids-masterclass)[Maths Through Coding](/courses/maths-through-coding)Ages 14 to 18 ### Divide and conquer Merge sort with an inversion count, tested against checking every pair on a real star catalogue. [Python for Teens](/courses/python-complete-masterclass-teens)[Data Science for Teens](/courses/data-science-course-for-teens-python-data)Ages 18 to 67 ### Orderings at work Measuring how much two rankings or schedules disagree, fast and without wrap-around mistakes. [Python Automation Course](/courses/python-ai-automation-masterclass-college)[Data Science Course](/courses/data-science-complete-masterclass-college)Coding and AI ## AI ranks everything from search results to songs. Why should an Armagh teenager count inversions in a star catalogue? Because comparing two orderings is how ranking systems are tested, and the count only means something if the keys are handled correctly. When an AI system ranks results, engineers measure how far its order is from a trusted one, often by counting pairs in the wrong order. A learner who has done exactly that on 7,840 real objects, and caught a 311,992-pair error caused by a circular key, knows both the method and its most common trap. The speed lesson matters too. Checking every pair of 7,840 items takes over thirty million comparisons; merge sort does it in under sixty-four thousand. As data grows to millions of items, choosing the right algorithm is the difference between an answer now and an answer never. So an Armagh teenager should keep learning to code in 2026, in the city where Dreyer ordered the heavens: computers can sort anything instantly, but someone has to know what the numbers mean before they count them. The longer argument is in [why coding is worth learning in 2026](/blog/is-coding-worth-learning-2026). Delivery ## Armagh, Keady or Markethill, all from home The city is ringed by villages and small towns. Online, each of them is the same distance from the lesson. ### City and villages A learner in Hamiltonsbawn and another in Keady can share one class without a journey into Armagh. ### Northern Ireland school years Lessons use the names local schools use, from P1 to Year 14, including the transfer test years and CCEA GCSEs and A levels, and teaching is in English. ### A lesson, not a pitch The free session teaches a genuine task and ends with a recommended level, course and weekly slot. No card details are taken. ### Stage, not postcode Five to ten learners at the same level, from Armagh, across the UK and abroad, so every stage has a sensible time. ### A twice-weekly pattern Two fixed lessons each week, around eight a month, with holidays and exam weeks agreed with the teacher in advance. ### Evenings in two time zones A 5 pm lesson in Armagh begins at 9.30 pm in India during summer time and 10.30 pm in winter, because India never changes its clocks; our teachers plan their evenings around families here. Across County Armagh and beyond Families in Portadown, Lurgan, Banbridge or Newry join exactly the same groups, since every lesson is online and groups are formed by level. Fees ## Armagh lesson fees The first lesson is free, then there is one monthly fee. First class**USD 0** A full lesson at no charge, ending with our advice on level, course and weekly time. Group tuition**USD 100** About eight live lessons a month in a group of five to ten learners at one stage. Private tuition**USD 150** About eight live lessons a month, with the teacher focused on your learner alone. Families in Richhill or Tandragee pay in US dollars, as every family outside India does, and our pages carry no pound prices. The free lesson comes first, with billing only after a course and weekly time are agreed; the pricing page explains pauses, missed lessons and switching between group and one-to-one teaching. Request placement[Check availability](https://wa.me/919123366161?text=Hello%20Modern%20Age%20Coders%2C%20I%20would%20like%20a%20free%20coding%20lesson%20for%20a%20learner%20in%20Armagh.)Reviews ## Six Google reviews from families, exactly as written Rated 4.9 across 547 Google reviews. These are real reviews, reproduced as written. ★★★★★ "The one step solution for my son. Modern Age Coders make learning coding so simple that kids love it. The teachers explain complex concepts clearly with practical exercises and interactive content." Ria Mukherjee Parent ★★★★★ "Modern Age Coders has been a game-changer for me. I struggled to grasp IT concepts and coding before joining, but their classes transformed everything. I can now confidently write complex programs with ease." Samriddha Mondal Student ★★★★★ "One of the most wonderful education centres out there. Education is not limited to school syllabus but focuses on skill development." Vansh Agarwal Student ★★★★★ "My child Dhairya is really enjoying the Modern Age Coders classes. This is his first online class and he eagerly looks forward to it. I can already see his improvement, and the teachers are very cooperative." Sonam Oswal Parent of Dhairya ★★★★★ "Modern Age Coders have wonderful teachers who teach in a clear, easy and practical way. The teacher boosts students' confidence and inspires them to learn without hesitation." Sonu Goyal Parent ★★★★★ "I highly recommend this computer coding class! The teachers are incredibly knowledgeable and passionate about coding." Ritu Kedia Parent Free placement class ## Book a free lesson for an Armagh learner The first task is chosen for the learner: a card-sorting game for a young child, a short Python program that sorts a list for a beginner, or Dreyer's catalogue and merge sort for a teenager ready for real data. ### Contact the team directly WhatsApp or call [+91 91233 66161](tel:+919123366161), or email [contact@modernagecoders.com](mailto:contact@modernagecoders.com). This is Modern Age Coders' actual contact, an Indian number, and not an invented Armagh one. [WhatsApp Modern Age Coders](https://wa.me/919123366161?text=Hello%20Modern%20Age%20Coders%2C%20I%20would%20like%20a%20free%20coding%20lesson%20for%20a%20learner%20in%20Armagh.) Submitted details are used for placement and follow-up. FAQ ## Armagh coding class questions The questions Armagh families ask us most. ### How many people live in Armagh? Census 2021 counted 16,310 usual residents in the Armagh settlement, 32,405 in the Armagh District Electoral Area and 218,656 in the Armagh City, Banbridge and Craigavon district. ### How does the district compare with Northern Ireland? It has slightly more children: 7.2% of residents were aged 10 to 14 and 7.1% aged 5 to 9 in 2021, against 6.7% and 6.5% across Northern Ireland, while 5.3% were aged 20 to 24, against 5.9%. ### What is an inversion count? The number of pairs in a list that appear in the wrong order. It is zero for a perfectly sorted list, and it can be counted quickly with merge sort instead of checking every pair. ### How out of order is the New General Catalogue today? Using modern positions from OpenNGC, 47,634 of its 30,728,880 pairs are in the wrong order, 0.155%, once right ascension is treated as a circle. Objects near the celestial poles are the most displaced. ### Where does the catalogue data come from? From OpenNGC, a free database of NGC and IC objects released under a Creative Commons attribution share-alike licence, which gives each object's position for the year 2000. ### Who was Dreyer? John Louis Emil Dreyer, a Dane, became director of Armagh Observatory after Thomas Romney Robinson died in 1882, and compiled the New General Catalogue of Nebulae and Clusters of Stars. We are not connected with the Observatory. ### When are Armagh lessons? Families in Armagh usually pick a slot after school, on a weekday evening or at the weekend, and we agree the time in the free lesson. India is four and a half hours ahead of Northern Ireland in summer and five and a half in winter. ### Is there a centre in Armagh? No. There is no Armagh centre and we have no premises anywhere in the UK, as every lesson is live online. A learner needs a computer with sound and a steady connection, and our phone number is Indian. ### What do lessons cost for an Armagh learner? The first lesson is free. After that, a group place is USD 100 a month for two live lessons a week, about eight a month, with five to ten learners; one-to-one lessons on the same timetable are USD 150 a month. Nothing is charged until the course, format and time are agreed. ### How are learners grouped? By level, pace and goals rather than age or address, with five to ten learners at one stage. When no group fits the learner's week, we offer one-to-one lessons. Explore Northern Ireland and the UK ## Northern Ireland and beyond In Belfast, the [Belfast page](/best-coding-class-in-belfast) runs PageRank over the city's bus stops. Learners working towards [CCEA GCSE Digital Technology](/ccea-gcse-digital-technology-programming-help) or [A level Software Systems Development](/ccea-a-level-software-systems-development-help) have their own pages. The [Northern Ireland guide](/coding-and-ai-classes-in-northern-ireland) explains school years, and the [UK coding page](/coding-classes-in-united-kingdom) links every other city. Book the free class[Message us on WhatsApp](https://wa.me/919123366161?text=Hello%20Modern%20Age%20Coders%2C%20I%20would%20like%20a%20free%20coding%20lesson%20for%20a%20learner%20in%20Armagh.)Free Armagh class[Call +91 91233 66161](tel:+919123366161) ## Keep exploring Modern Age Coders ### Coding classes in nearby cities - [Best Coding Classes in Bangor, County Down](/best-coding-class-in-bangor-northern-ireland) - [Best Coding Classes in Aberdeen](/best-coding-class-in-aberdeen) - [Best Coding Classes in Bangor, Wales](/best-coding-class-in-bangor-wales) - [Best Coding Classes in York](/best-coding-class-in-york) - [Best Coding Classes in Bath](/best-coding-class-in-bath) - [Best Coding Classes in Wrexham](/best-coding-class-in-wrexham) - [Best Coding Classes in Luton](/best-coding-class-in-luton) - [Best Coding Classes in Lichfield](/best-coding-class-in-lichfield) - [Best Coding Classes in St Davids](/best-coding-class-in-st-davids) - [Best Coding Class in Carlow](/best-coding-class-in-carlow) ### Learn more - [Data Science Course in the Netherlands](/data-science-course-netherlands) - [Coding Classes for Teens in the Netherlands](/coding-classes-for-teens-netherlands) - [Machine Learning for School Students, Netherlands](/machine-learning-for-school-students-netherlands) - [Coding Classes for Kids in the Netherlands](/coding-classes-for-kids-netherlands) ### Free resources - [C++ Tutorial: From Basics to Advanced](/resources/cpp) - [Feature Engineering and Feature Selection](/resources/ai-and-machine-learning/feature-engineering) - [Introduction to C++](/resources/cpp/introduction-to-cpp) - [Mathematics for Machine Learning](/resources/ai-and-machine-learning/mathematics-for-ml) ### From the blog - [Scratch vs Python for Kids: The Difference and Which First](/blog/scratch-vs-python-which-better-young-learners) - [Learn Python Step by Step: The Free Tutorial Library](/blog/learn-python-step-by-step) - [Learn Python for Beginners: Complete Step-by-Step Guide (2026)](/blog/python-for-beginners) ### Start here - [Modern Age Coders pricing, one honest price per plan](/pricing) - [How Modern Age Coders teaches, small batches and real projects](/how-we-teach) --- *Canonical: https://learn.modernagecoders.com/best-coding-class-in-armagh*