--- title: "Coding Classes in Castletroy, Limerick | Modern Age Coders" description: "Coding, Python, AI and data classes for Castletroy learners aged 6 to 67, taught live online in small level-matched groups or one to one. The first lesson is free." canonical: https://learn.modernagecoders.com/coding-classes-in-castletroy-limerick source: src/pages/coding-classes-in-castletroy-limerick.html --- > Coding, Python, AI and data classes for Castletroy learners aged 6 to 67, taught live online in small level-matched groups or one to one. The first lesson is free. Skip to contentCourses for Castletroy ## Courses Castletroy learners start with Pick by age; in the free opening lesson the teacher either keeps the course or recommends another. [![Coding for Kids course thumbnail](/images/kids-coding.webp)Ages 6 to 10Coding for KidsBlocks and matching: a spot-the-difference game where two pictures that should differ turn out identical.See the syllabus](/courses/kids-coding-blocks-masterclass)[![Python and AI for Kids course thumbnail](/images/python-kids.webp)Ages 10 to 13Python and AI for KidsPython with two lists compared item by item, counting where they agree and where they differ.See the syllabus](/courses/python-ai-kids-masterclass)[![Data Science for Teens course thumbnail](/images/data-science-teens.webp)Ages 13 to 18Data Science for TeensSensor data in Python: comparing every pair of columns and testing values against what is physically plausible.See the syllabus](/courses/data-science-course-for-teens-python-data)[![Python Automation Course course thumbnail](/images/python-college.webp)College and adultPython Automation CourseFor adults who inherit data pipelines and need automatic checks that catch a copied or mislabelled field.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)Signature project ## Compare every column with every other before trusting any of them The OPW's Annacotty station, six water-quality channels, 837 hourly readings each from 15 August to 19 September 2026, as published on waterlevel.ie. Each pair of channels was compared reading by reading. | Channel pair | Readings compared | Identical | | --- | --- | --- | | Salinity and pH | 837 | 837 | | Turbidity and Temperature | 837 | 1 | | Any of the other 13 pairs | 837 each | 0 | ### One pair, all the time Out of 15 possible pairings of the six channels, salinity and pH agree at all 837 readings. The next closest pair, turbidity and the channel labelled Temperature, coincides once, which is what chance produces. ### A second clue The salinity column runs from 7.24 to 8.89, the same range as pH, while conductivity in the same water reads between 0.167 and 0.409. Salinity's correlation with conductivity is 0.313, exactly the same as pH's, and its correlation with pH is 1.000: the column carries nothing the pH column does not. ### What it does not tell us The check shows that two columns are copies. It cannot say which label is right, whether the fault is in the instrument or in publishing, or what the real salinity was. Those are questions for the data owner. ### Validate channels against each other before you analyse them A sensor file can look perfect row by row and still be wrong as a whole: a column copied from another, two labels swapped, a unit changed without notice. Checks that compare columns catch what a glance at one column never will. Look for pairs that are identical far more often than chance allows, for columns whose range belongs to a different quantity, and for relationships that ought to hold and do not. Then report what was found to the publisher, and keep the suspect column out of the analysis until it is explained. This is about the relationships inside the data, which is a different habit from checking a file against its written description. The learner's program downloads the month file for each channel, lines the readings up by timestamp, and for every pair counts how many times the two values are exactly equal. With six channels that makes 15 pairs, a double loop of a few lines. It prints a small grid of counts, flags any pair above a threshold such as half the readings, and then prints the minimum and maximum of every column beside its label so that a human can see whether each range makes sense for what the label claims. On this file the grid has one glaring cell and fourteen near-zeros. ### The other channels Nothing in the other columns looks copied. Turbidity reached 44.1 at its highest in these weeks, dissolved oxygen ranged up to 107.7 percent of saturation, and the water level itself was read every 15 minutes, 3,348 times. ### Data the OPW has not checked The OPW describes the readings on waterlevel.ie as provisional and unvalidated and asks users to credit the site. A flaw found in unchecked data is exactly the kind of thing validation exists to catch, and it says nothing about the river. ### A fixed window The counts refer to the month file downloaded on 20 September 2026. A later file may have been corrected, which is the outcome a good report hopes for. Castletroy, named ## Castletroy, as its schools and venues describe it Facts that each organisation publishes itself, on its own site or on the council's pages, with eircodes where they are given. | Place | What its own source says | | --- | --- | | Castletroy College | Newtown, Castletroy, V94 6D85 | | Gaelscoil Chaladh an Treoigh | Founded by the community in 2001, 438 pupils | | University Concert Hall | Foundation Building, Sreelane, V94 PX58 | | OPW Annacotty station | 1.07 km from Castletroy College | ### The secondary school Castletroy College describes itself as a co-educational community college of over 1,200 students under the auspices of Limerick and Clare Education and Training Board. ### Primary through Irish The council's page for Gaelscoil Chaladh an Treoigh says the school was founded by the community in 2001 to provide primary education through Irish, and has grown to 438 pupils with 26 full-time staff. ### The concert hall The University of Limerick says University Concert Hall opened in 1993, officially opened by Taoiseach Albert Reynolds and US Ambassador Jean Kennedy Smith, and has a 1,000-seat tiered lecture theatre. What this page does not claim No population is printed for Castletroy, because the page uses only facts that named organisations publish about the place. The sensor project says nothing about water quality or safety at Annacotty or anywhere else; it is about checking data before using it. Learning here ## Learning from Castletroy, week to week Two lessons fill most weeks, and each one is taught live by a teacher from start to finish. ### Children Children begin with block code and matching games, noticing when two things that should be different are the same. ### Teenagers Teenagers take on Python, websites, AI projects and real sensor files like the Annacotty station. ### Adults Adults can start from nothing; the first lesson settles the course. Sensor readings come from the OPW through waterlevel.ie; the pairwise counts, ranges and distance are our own calculations, run on 20 September 2026. The schools, the council and the university are quoted from their own pages. Learning ladder ## From spot-the-difference to a column audit Bands give a starting guess, and lesson one confirms the right level. Ages 6 to 10 ### Same or different Block-coded games that compare two sets of shapes and count the matches. [Coding for Kids](/courses/kids-coding-blocks-masterclass)[Scratch Coding for Kids](/courses/scratch-programming-complete-course)Ages 11 to 13 ### Matching lists Python that lines up two lists and counts where they agree. [Python and AI for Kids](/courses/python-ai-kids-masterclass)[Maths Through Coding](/courses/maths-through-coding)Ages 14 to 18 ### Pairwise checks Every pair of columns compared, ranges tested and suspect data set aside. [Data Science for Teens](/courses/data-science-course-for-teens-python-data)[Python for Teens](/courses/python-complete-masterclass-teens)Ages 18 to 67 ### Data validation at work Automatic checks in pipelines that catch copied, swapped and mislabelled fields. [Python Automation Course](/courses/python-ai-automation-masterclass-college)[Data Analysis Course](/courses/data-analysis-mastery-course-college)Coding and AI ## Ask an assistant to summarise the Annacotty water readings It will usually describe each column as labelled. Give an AI assistant the six Annacotty channels and ask for a summary of the water, and it will often report a salinity of around 8.4 as though it were real, perhaps even comment on it. Each column is summarised correctly. Nothing in that process compares the columns, so the copy goes straight through. After running the pairwise check, the learner asks the assistant which columns ever share values, whether each range suits its label, and whether the columns that should move together actually do. An assistant that answers those has actually validated the file. Summarising a column is quick. Noticing that two columns are secretly the same is the skill. The longer argument is in [why learning to code still pays off for a learner](/blog/is-coding-worth-learning-2026). Delivery ## How lessons run for Castletroy The specifics. ### Teacher-led, live Each lesson is run live by a teacher who follows every learner's screen and code as they work. ### Same level, same group Five to ten learners at one level, from Castletroy, the rest of Ireland or abroad. ### Weekly pair About eight lessons a month, on the same two weekly times set at the start. ### School rhythm The plan allows for holidays, mid-terms and exam weeks from day one. ### Your equipment A laptop or desktop, a microphone and speakers or headphones, and a connection that handles video. ### Individual teaching One-to-one lessons for a learner who is ahead, needs more time, or can only attend when no group meets. Only online We have no premises in Castletroy, in Limerick or anywhere in Ireland. Lessons happen over video and are identical wherever the learner joins from. Fees ## Castletroy fees All in one place. First class**USD 0** A first lesson, with a level check, free of charge. Group tuition**USD 100** A month in a same-level group of five to ten, about eight live lessons. Private tuition**USD 150** A month of private lessons on the same schedule. Every family outside India pays the same monthly US dollar fee. The free lesson commits no one, charges start with the course, and the pricing page covers holidays, missed lessons and moving between group and private teaching. Request placement[Check availability](https://wa.me/919123366161?text=Hello%20Modern%20Age%20Coders%2C%20I%20would%20like%20to%20book%20a%20free%20coding%20lesson%20for%20a%20learner%20in%20Castletroy.)Reviews ## Six family reviews from Google, untouched 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 first lesson in Castletroy Let us know the learner's age and what interests them, and the first hour will be shaped around it. It might end with a game, a working first program, or two columns caught being secretly the same. ### 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 Castletroy one. [WhatsApp Modern Age Coders](https://wa.me/919123366161?text=Hello%20Modern%20Age%20Coders%2C%20I%20would%20like%20to%20book%20a%20free%20coding%20lesson%20for%20a%20learner%20in%20Castletroy.) Submitted details are used for placement and follow-up. FAQ ## Castletroy coding class questions Questions Castletroy families ask. ### Is there a Modern Age Coders centre in Castletroy? No. Lessons are taught live on video and we have no premises in Ireland. A learner needs a computer, sound and a microphone, and a reliable connection. The phone number here is our number in India. ### What happens in the sensor project? Learners download the OPW's Annacotty water-quality files and compare every pair of columns. In the five weeks to 19 September 2026 the salinity and pH columns were identical at all 837 readings, which no two real instruments would produce. ### Does this mean the river water is unsafe? No. The project is about checking data, not judging water quality. It uses provisional, unvalidated readings, and questions about the river are for the responsible authorities. ### Why does the page give no population for Castletroy? District pages use only facts that named organisations publish about the place, here the schools, the council, the university and the OPW, and none of them gives a head count. ### When are lessons held? Weekday afternoons after school and into the evening, and weekend daytimes. All times are in Irish time; our teachers work from India, four and a half hours ahead during Irish summer time and five and a half in winter, and only hours that suit both sides are offered. ### Are there classes for adults? Yes, for anyone up to sixty-seven, beginners included. After the first lesson an adult chooses a small group at their level or lessons on their own. ### Will my child study with other Castletroy children? Not necessarily. Groups depend on level, so classmates may be in Limerick, elsewhere in Ireland or overseas. ### What do coding classes in Castletroy cost? The first lesson is free. A group place is then USD 100 a month for about eight live lessons, two a week, with five to ten learners, and one-to-one lessons on the same schedule are USD 150 a month. Terms are agreed before anything is paid. ### How big are the groups? Five to ten learners, grouped by level, pace and aims rather than age or address. If no group fits a workable hour, lessons are one to one. Explore Ireland ## Around Castletroy and the Shannon The [Limerick](/best-coding-class-in-limerick) page covers the city and its university, [Shannon](/best-coding-class-in-shannon) is across the estuary with an airport data project, and the [Munster](/coding-and-ai-classes-in-munster) page links the province together. For more sensor data, the Cork district of [Ballincollig](/coding-classes-in-ballincollig-cork) reads the Lee below a dam, and the [Ireland hub](/coding-classes-in-ireland) lists the rest. Book the free class[Message us on WhatsApp](https://wa.me/919123366161?text=Hello%20Modern%20Age%20Coders%2C%20I%20would%20like%20to%20book%20a%20free%20coding%20lesson%20for%20a%20learner%20in%20Castletroy.)Free Castletroy class[Call +91 91233 66161](tel:+919123366161) ## Keep exploring Modern Age Coders ### Coding classes in nearby places - [Coding Classes in Causeway Coast and Glens](/coding-classes-in-causeway-coast-and-glens) - [Coding Classes in Carmarthenshire](/coding-classes-in-carmarthenshire) - [Coding Classes in Ceredigion](/coding-classes-in-ceredigion) - [Coding Classes in Capelle aan den IJssel](/coding-classes-in-capelle-aan-den-ijssel) - [Coding Classes in Charlois, Rotterdam](/coding-classes-in-charlois) - [Coding Classes in Cambridgeshire](/coding-classes-in-cambridgeshire) - [Coding Classes in Rutland](/coding-classes-in-rutland) - [Coding Classes in Roosendaal](/coding-classes-in-roosendaal) - [Coding Classes in Roermond](/coding-classes-in-roermond) ### Learn more - [Leaving Cert Computer Science Grinds Online](/leaving-cert-computer-science-grinds-online) - [Full Stack Software Development Course, Netherlands](/full-stack-software-development-course-netherlands) - [Coding for College Students in Ireland](/coding-for-college-students-ireland) - [Data Science Course in Ireland](/data-science-course-ireland) ### Free resources - [AI & Machine Learning Tutorial: Basics to Deep Learning](/resources/ai-and-machine-learning) - [Abstraction](/resources/java/abstraction-and-interfaces) - [Deep Learning with TensorFlow and Keras](/resources/ai-and-machine-learning/deep-learning-with-tensorflow-keras) - [Generics in Java](/resources/java/generics-in-java) ### From the blog - [How AI and Automation Are Transforming Small and Medium Businesses](/blog/ai-automation-transforming-small-medium-businesses) - [30+ Scratch Project Ideas for Kids: Starter Projects to Advanced Games](/blog/30-plus-scratch-project-ideas-kids-fun-coding-beginner-advanced) - [How to Read and Write Files in Python (The Complete Guide)](/blog/how-to-read-and-write-files-in-python) ### Start here - [Real projects built by Modern Age Coders students](/student-labs) - [Browse every live course at Modern Age Coders](/courses) --- *Canonical: https://learn.modernagecoders.com/coding-classes-in-castletroy-limerick*