--- title: "Online Coding and Python Classes in Brentwood | AI, Ages 6 to 67" description: "Python, coding, AI and vibe coding lessons online with a live tutor for Brentwood, Shenfield, Hutton and Ingatestone, ages 6 to 67. First lesson free." canonical: https://learn.modernagecoders.com/online-coding-and-python-classes-in-brentwood source: src/pages/online-coding-and-python-classes-in-brentwood.html --- > Python, coding, AI and vibe coding lessons online with a live tutor for Brentwood, Shenfield, Hutton and Ingatestone, ages 6 to 67. First lesson free. Skip to contentBrentwood course picks ## Python and coding courses to begin with in Brentwood Choose the row that matches the learner. In each case the first live lesson is a free trial and we never ask for card details to book it. [![Python and AI for Kids course thumbnail](/images/python-kids.webp)Ages 9 to 13Python and AI for KidsA first Python course for children, with small AI projects and the habit of timing what they write.See the syllabus](/courses/python-ai-kids-masterclass)[![Problem Solving and Computational Thinking for Kids course thumbnail](/images/problem-solving-kids.webp)Ages 7 to 12Problem Solving and Computational Thinking for KidsHow to think before coding: counting steps, spotting repeated work, finding a shorter way.See the syllabus](/courses/problem-solving-and-computational-thinking-for-kids)[![Python for Teens course thumbnail](/images/python-teens.webp)Ages 13 to 17Python for TeensFull Python for teenagers, from loops to data structures, including the Brentwood profiling exercise.See the syllabus](/courses/python-complete-masterclass-teens)[![Data Structures & Algorithms Course course thumbnail](/images/dsa-college.webp)Students and adultsData Structures & Algorithms CourseAlgorithms and data structures with measured running times, for degrees, interviews and real projects.See the syllabus](/courses/data-structures-algorithms-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)Brentwood borough ## Brentwood, Shenfield, Hutton and Ingatestone Census populations, recorded place names and the postcode districts the project uses. | Area | Usual residents | | --- | --- | | Brentwood built-up area | 55,340 | | Brentwood borough | 77,047 | The built-up area and the borough are different boundaries, published separately. According to postcodes.io, Shenfield and Pilgrims' Hatch are suburban areas in CM15, Hutton and Warley in CM13 and Brook Street in CM14, while Ingatestone in CM4 and Great Warley in CM13 are villages in the borough. Pupils here study the English national curriculum. Tell us a school year between Year 2 and Year 13, or an adult's goals, and we fit the lessons around GCSE or A level work if there is any. ### More for Essex See also [coding classes in Essex](/coding-classes-in-essex), [Basildon](/best-coding-and-ai-classes-in-basildon) and [Chelmsford](/best-coding-class-in-chelmsford). Our view on thinking before tools is at [learn to think, not just use AI tools](/learn-to-think-not-just-use-ai-tools-uk). The Brentwood project ## Profiling with cProfile: find the slow line before you fix anything A working program, a wrong guess, a measurement, and two fixes of very different size. Ordnance Survey's Code-Point Open file gives a map coordinate for every postcode in Great Britain. In the CM file, 2,144 postcodes carry the Brentwood district code, most of them in CM13, CM14 and CM15. The learner writes the obvious program: read the file, then for each postcode loop over all the others, call a small dist() function, and remember the closest. It is correct and it takes about 3.5 seconds. Asked why, most people blame reading the file from disk. | Part of the program | Times called | Share of run time | | --- | --- | --- | | dist() and the square root inside it | 4,594,592 | 67.5% | | The double loop around it | 1 | 30.6% | | Reading the postcode file | 1 | 1.9% | The profiler disagrees with the guess. Reading the file is under 2% of the run. Two thirds of the time goes on dist(), which is tiny but is called 4,594,592 times, once for every ordered pair of postcodes (2,144 times 2,143). That number, not the function's length, is the problem. Profiling slows a program down, which is why the profiled run took 6.495 seconds; the timings below are from ordinary runs. | Version | Pairs compared | Time | Speed-up | | --- | --- | --- | --- | | 1. dist() helper with a square root | 4,594,592 | 3.54 s | baseline | | 2. Squared distance written inside the loop | 4,594,592 | 1.04 s | 3.4 times | | 3. 500 m grid, search nearby squares only | 291,987 | 0.11 s | 32 times | Version 2 attacks the cost of each call: it compares squared distances, so no function call and no square root are needed until the very end. That is worth 3.4 times. Version 3 attacks the count: it drops each postcode into a 500 metre grid square and looks only in neighbouring squares, widening the search only when needed. It compares 291,987 pairs, 6.36% of the original number, and runs 32 times faster. All three versions return exactly the same answer for all 2,144 postcodes, which the learner checks in code. Timings depend on the machine; the call counts do not. ### Ages 8 to 11 Time two ways of finding the closest pin on a board, and count the measurements each one needs. ### Ages 11 to 15 Write the double loop in Python, run cProfile on it and read the call counts. ### Ages 15 and up Build the grid version, prove it matches, and explain why changing the count beat changing the cost. ### Source and licence Contains OS data (C) Crown copyright and database right 2026, and Royal Mail and National Statistics data (C) Crown copyright and database right 2026, from Code-Point Open version 2026.3.0 under the Open Government Licence. The programs, call counts and timings are our own work on one laptop. Measuring AI-written code ## What profiling teaches about vibe coding and AI agents An assistant can write a loop in a second. Whether the loop is fast is a separate question. | In the postcode program | When an AI writes your code | | --- | --- | | The file-reading guess was wrong | Do not accept a guess about speed, yours or the AI's | | One small function ate 67.5% of the time | Ask where the time goes before asking for a rewrite | | Tidying the call gave 3.4 times | Micro-fixes help a little | | Cutting the number of calls gave 32 times | A better method helps a lot | | All versions were checked to agree | Faster code must still be the same code | Vibe coding is the practice of describing a program in everyday words and letting an AI produce it. The first draft an AI gives for a task like this is very often the double loop, because it is the simplest thing that works. A Brentwood learner who has used a profiler knows what to do next: run cProfile, paste the report back to the AI, and ask for a change aimed at the line that matters. AI agents that run code on your behalf need the same discipline, since an agent that loops wastefully also spends money wastefully. Learners come to agent projects when their Python is dependable, which is typically at 16 or older, and Copilot Studio agents are available as one-to-one tuition only. Two further pages: [the AI agents course for students](/ai-agents-course-for-students-uk) and [understand the code, don't copy-paste](/understand-the-code-dont-copy-paste-uk). Ordnance Survey, Royal Mail, the Office for National Statistics and postcodes.io have no connection with Modern Age Coders. We used their openly licensed data, and what we did with it is our responsibility. Course ladder ## Counting steps, then writing fast Python School year is where we start guessing. One free lesson is how we find out. Years 2 to 6 ### How to think Count the steps in a method and look for a shorter one. [Problem Solving and Computational Thinking for Kids](/courses/problem-solving-and-computational-thinking-for-kids)[Scratch Coding for Kids](/courses/scratch-programming-complete-course)Years 5 to 8 ### First Python Real typed code, with AI used as a helper the child can question. [Python and AI for Kids](/courses/python-ai-kids-masterclass)[Vibe Coding for Kids](/courses/vibe-coding-for-kids-beginners-ai-scratch-game-dev)Years 9 to 13 ### Python in depth Functions, data structures and profiling next to GCSE and A level. [Python for Teens](/courses/python-complete-masterclass-teens)[Vibe Coding for Teens](/courses/vibe-coding-for-teens-python-web-ai-projects-course)Adults ### Algorithms and AI Efficient code, machine learning and agents for work or study. [Data Structures & Algorithms Course](/courses/data-structures-algorithms-masterclass-college)[Python Masterclass](/courses/python-programming-masterclass-zero-to-advanced-college)AI and performance ## What is profiling in Python, and can AI tell you why code is slow? Profiling is measuring where a running program spends its time, function by function; an AI can suggest why code is slow, but only a measurement such as a cProfile report can confirm it. For 2,144 Brentwood postcodes, cProfile showed one helper function called 4,594,592 times and taking 67.5% of the run, while reading the file took 1.9%; a grid-based rewrite then ran 32 times faster. A learner with that experience asks an AI for the profile before the fix, and checks that the faster version still gives the same output. It is a small habit, and it is one reason a Brentwood teenager who can code gets far more from AI tools than one who can only ask. The longer argument is in [why teenagers should still learn to code in 2026](/blog/is-coding-worth-learning-2026). Practicalities ## Online lessons for Brentwood, step by step Lessons run over video. A laptop or desktop is strongly preferred to a tablet, because the learner will be typing code. ### Code typed by the learner We never hand over finished programs. The student writes, runs and debugs while the tutor coaches. ### One trial, then a plan A free lesson tells us the right level, and you get a suggested course at the end of it. ### Nothing to pay up front The trial has no cost and needs no card. ### Small, matched groups Five to ten learners at one level, joining from anywhere in the UK. ### Two sessions weekly During term. Essex school holidays are skipped once we have your dates. ### Steady UK timing We absorb the hour when the clocks change, so your slot holds. Why online suits coding The tutor sees the learner's actual screen, every error message included, and a class can be filled by level from across the country. Fees ## Lesson fees for Brentwood Outside India we charge one set of prices, shown here. First class**USD 0** Your first complete lesson is free, and we recommend a course after it. Group tuition**USD 100** Small-class teaching, approximately eight lessons per month. Private tuition**USD 150** Private teaching, approximately eight lessons per month. All fees are in US dollars; there is no sterling price list. No invoice goes out until the trial is finished and you have chosen a course and a time. For holidays, missed lessons and changes of format, see the pricing page. Request placement[Check availability](https://wa.me/919123366161?text=Hello%20Modern%20Age%20Coders%2C%20I%20would%20like%20a%20free%20Python%20or%20coding%20lesson%20for%20someone%20in%20Brentwood.)Reviews ## Essex families and UK learners reviewing us on Google 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 your free Brentwood lesson Let us know the age or year group and any interest at all. A trial can be a step-counting puzzle, a Scratch game made with an AI helper, a first Python program, or timing two versions of the same code. ### Want a class sooner? Book a priority demo A priority demo is a full class of about 45 to 60 minutes. After the class the mentor sends a written skill report and a personal learning roadmap on WhatsApp. If you enrol, the demo fee is adjusted against your first month's fee. Share your demo Order ID with us on WhatsApp and we take it off. [Book a priority demo](/book-demo) ### Contact the team directly WhatsApp or call [+91 91233 66161](tel:+919123366161), or email [connect@modernagecoders.com](mailto:connect@modernagecoders.com). This is Modern Age Coders' actual contact, an Indian number, and not an invented Brentwood one. [WhatsApp Modern Age Coders](https://wa.me/919123366161?text=Hello%20Modern%20Age%20Coders%2C%20I%20would%20like%20a%20free%20Python%20or%20coding%20lesson%20for%20someone%20in%20Brentwood.) Submitted details are used for placement and follow-up. FAQ ## Brentwood: common questions About profiling, the postcode project, Python, vibe coding and arrangements. ### What is the population of Brentwood? Brentwood borough had 77,047 usual residents at the 2021 census. The ONS built-up area of Brentwood had 55,340. ### Do you offer online Python classes for Brentwood? Yes. Python and coding are taught by live video to ages 6 to 67 across Brentwood, Shenfield, Hutton, Ingatestone and the rest of the borough. ### What is cProfile? cProfile is the profiler built into Python. It records how many times each function is called and how much time each takes. ### What is a hotspot in code? A hotspot is the small part of a program where most of the running time is spent. Speeding up anything else makes little difference. ### What did the Brentwood project show? A distance function called 4,594,592 times used 67.5% of the run. Rewriting it inline was 3.4 times faster, and a grid search was 32 times faster with identical results. ### Is vibe coding taught as well? Yes. Learners of all ages practise telling an AI what to build and then checking, measuring and correcting it. ### When do learners start on AI agents? Once they write Python reliably, generally from 16 upwards. Copilot Studio agents are taught one-to-one only. ### Can you help with GCSE or A level computer science? Yes, including the programming project work. We teach the understanding and do not promise grades. ### What do classes cost? The first lesson costs nothing. Group lessons are USD 100 a month and private lessons USD 150 a month. ### Do you teach during school holidays? Not unless you ask. Normally lessons pause for the dates you give us. Around Essex ## Other Essex pages and their projects Try [Basildon](/best-coding-and-ai-classes-in-basildon) (choosing a quicksort pivot), [Chelmsford](/best-coding-class-in-chelmsford) or the county page for [Essex](/coding-classes-in-essex). The [East of England page](/coding-and-ai-classes-in-east-of-england) and the [UK hub](/coding-classes-in-united-kingdom) list the rest. Book the free class[Book a priority demo](/book-demo)[WhatsApp our team](https://wa.me/919123366161?text=Hello%20Modern%20Age%20Coders%2C%20I%20would%20like%20a%20free%20Python%20or%20coding%20lesson%20for%20someone%20in%20Brentwood.)Free class[Priority demo](/book-demo)[Call us](tel:+919123366161) ## Keep exploring Modern Age Coders ### Related courses and guides - [Online Coding and Python Classes in Bury](/online-coding-and-python-classes-in-bury) - [Online Coding and Python Classes in Braintree](/online-coding-and-python-classes-in-braintree) - [Online Coding and Python Classes in Castleford, West Yorkshire](/online-coding-and-python-classes-in-castleford) - [Online Coding and Python Classes in Bracknell](/online-coding-and-python-classes-in-bracknell) - [Online Coding and Python Classes in Cheltenham](/online-coding-and-python-classes-in-cheltenham) - [Online Coding and Python Classes in Bolton](/online-coding-and-python-classes-in-bolton) - [Online Coding and Python Classes in Poole](/online-coding-and-python-classes-in-poole) - [Online Coding and Python Classes in Edgbaston, Birmingham](/online-coding-and-python-classes-in-edgbaston-birmingham) - [Online Coding and Python Classes in Altrincham](/online-coding-and-python-classes-in-altrincham) ### Learn more - [Python for Kids in Dubai](/python-for-kids-in-dubai) - [AI and Python Academy for Girls, Netherlands](/ai-and-python-academy-for-girls-netherlands) - [AI and Python Academy for Students in Salalah](/ai-and-python-academy-salalah) - [Python to AI Roadmap for Students in the Netherlands](/python-to-ai-roadmap-for-students-netherlands) ### Free resources - [Python Tutorial for Beginners: Complete Guide](/resources/python) - [Conditional Statements in Python (if, elif, else)](/resources/python/conditional-statements) - [File Handling in Python](/resources/python/file-handling-in-python) - [Introduction to Python](/resources/python/introduction-to-python) ### From the blog - [Python Tutorials & Guides](/blog/topic/python) - [How to Find HCF and LCM in Python (5 Easy Methods)](/blog/how-to-find-hcf-and-lcm-in-python) - [How to Read and Write Files in Python (The Complete Guide)](/blog/how-to-read-and-write-files-in-python) - [Python Dictionary: The Complete Guide With 20 Examples](/blog/python-dictionary-complete-guide) ### Start here - [Try a free trial class with a Modern Age Coders mentor](/free-trial) - [About Modern Age Coders, teaching since 2020](/about) --- *Canonical: https://learn.modernagecoders.com/online-coding-and-python-classes-in-brentwood*