# An Algerian math teacher's lesson-plan plugin: the formatting is free, the exams are paid · Chrome extension

> Source: https://stringers.io/en/ext/chrome_eakdfhkloohoodjoomammngcgcdccbpb.html (Stringers / 什么值得做, generated 2026-11-08)
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> The author is a front-line math teacher with 12k followers. Ahead of late-September school start, when new teachers prep for permanent posts, he posted "one-minute lesson plan" videos on his Facebook page daily; the top one got 38k views.

[Chrome extension](https://stringers.io/en/ext/index.md) · written 11-6

مذكرة الأستاذ - DIHEM PRO Lite ·

# An Algerian math teacher's lesson-plan plugin: the formatting is free, the exams are paid

**What it is** A lesson-plan editor for Algerian teachers: it fills in official format templates, typesets formulas, and exports to PDF. The AI content works by copying a prompt into free ChatGPT and pasting the reply back; exams and Word export require buying his paid Windows software.

**Why it took off** The author is a front-line math teacher with 12k Facebook followers. Right before late-September school opening, when new teachers need to prepare their confirmation lessons, he posted "lesson plan in one minute" videos on his own Facebook page every day, and the top one got 38k views.

**C** **How you could follow** Don't go after it in Algeria. Find a teacher with a following in their own national teaching community, partner up, and build the official template for another country that has a standardized lesson-plan format. The AI side costs nothing if it's copy-paste; use the free plugin as a lead magnet, sell exams and Word export as a one-time purchase, and time screen-recorded videos to the school-opening season.

Grade C: its growth came almost entirely from the author's personal influence in local teacher circles, which followers can't replicate. Several local web platforms in Algeria already do the same thing, the audience's willingness to pay is low, and a single local plugin tops out at around 10,000 users. The playbook could transfer to other countries, but it needs the local teacher on camera, so copying it isn't worth it. Few people know about it yet

356 users · rating 5.0 (2)

「مذكرة الأستاذ」(老师的教案)是阿尔及利亚比斯克拉一位中学数学老师做的 Chrome 插件:按当地官方体例排教案、公式排得漂亮、导出 PDF;AI 那部分不花他一分钱,让老师自己去免费的 ChatGPT 里问。它 9 月 23 日上架,到 11 月初才 367 个用户,但这 367 个人几乎都是从他自己 1.2 万粉的 Facebook 主页来的,插件真正的作用是把人带到他收费的 Windows 软件上。值得看的是这套打法;生意本身还很小。

### A video "for every new teacher"

On Oct 22, 2026, the Facebook page "Math" (@functionLinear, based in Biskra, about 12,131 followers) posted a video titled "For every new teacher: the best way to generate all-subject lesson plans with AI." It has 38k views, 448 likes and 52 comments to date, the page's most-watched video this year. The page owner is Dihem Abdellatif (ديهم عبد اللطيف), a middle-school math teacher by trade.

The timing matters. Algerian schools open in late September, and new hires must prepare a "confirmation lesson" (الترسيم) in their first year; inspectors observe it, and the lesson plan has to follow the format set by the ministry. When a veteran teacher says "this is the fastest way to write them," that carries real weight in this community.

On Oct 31 he posted another one, titled with a single line, "مذكرة احترافية في 1 ثانية" (a professional lesson plan in one second). It runs 1 min 35 sec and has 4,700 views. The pinned comment is his own Telegram group link, and someone below wrote: "Please explain in more detail." (Facebook video page, 11-06)

### What it is

Once installed, it's a form-filling editor with live preview. The free features listed on the Chrome Web Store page:

- 6 "official" lesson-plan templates: a formal version with the Republic and Ministry of Education header, a version modeled on the local star teacher "عقبة نوي"'s style, a blue version commonly used for confirmation lessons, and for primary levels a green template is applied automatically;

- Preview while you type; math symbols are rendered with KaTeX, and the printout matches the screen;

- Direct PDF export;

- A panel floating over the ChatGPT, Gemini, Qwen, DeepSeek and Claude web pages: click "copy prompt," paste and send it yourself, then copy the reply back and click "paste reply," and the content fills the template automatically. The store page specifically notes it "never automatically reads or writes those pages," and data stays local in the browser with no server.

The clever part of the whole product: the AI cost is paid by users' free chat accounts, so the author has no model costs, and teachers don't need to apply for an API key.

### Where the money comes from

The plugin has four tabs marked "🔒 Paid": exams (with scoring sheets), targeted homework (practice plus detailed solutions), confirmation-lesson plans, and Word export with editable formulas. To unlock them, the support page only says "email us."

The real product is the Windows software DIHEM PRO Ultra released in Oct 9 (searchable on the Microsoft Store), which bundles several programs he built before: 9 template sets, exams and scoring sheets, confirmation-lesson plans, grade entry and class analysis, annual planning, an AI assistant, and Word export. The launch post says tutoring centers (سنتر) that sign up get 7% off. That post has 70 likes, 53 comments and 16 shares, and someone in the comments asked directly "how much is the subscription?"

No price is public. On another of his pages, the older Dihem-Pro listed a one-time payment of 2,500 dinars, roughly $19 at the official exchange rate. Someone commented "لازم تخلص" (you have to pay up) on the Oct 22 video, showing people know the free tier is only the entry point. How many actually paid isn't visible from outside.

### Where users come from

Almost all of it came from the author himself:

- **His own Facebook page** : every update gets a post or short video, with the link in the first comment, asking people to "share it with colleagues." The Oct 5 post announcing the plugin was "officially accepted by the Chrome Web Store" said "the PRO version is completely free," with 32 likes;

- **School season and new teachers** : the plugin was listed in Sep 23, right as school opened; the top video's title targets new teachers directly, and one of the paid features is specifically confirmation-lesson plans;

- **Rename and relaunch** : In March it was called "الأستاذ الذكي" (Smart Teacher), a web platform. In June it became a free AI lesson-plan platform (8,700 views). In September it was Dihem1, and in October it turned into a Chrome extension plus Ultra. On the Microsoft Store, dihem1 and DIHEM PRO are two separate listings.

- **Tutoring centers** : The 7 discount is a way to land customers who buy several copies at once.

Not found: nothing on TikTok, X, or in media coverage. I did not check whether they run Facebook ads.

The numbers back this up. Chrome Web Store users: 11-01 to 11-03 has held steady at 333,11-05, and the latest count is 356 367, up about 10% in a week. Rating 5.0 from only 2 reviews. This is organic growth inside a fan circle, not a breakout.

### Who it's competing with

Searching the Chrome Store for words like "lesson plan" or "teacher", it is the only extension that generates lesson plans. But outside Chrome, plenty of others in Algeria already do the same thing:

| Product | Form | Scale | Compared with alternatives |
|---|---|---|---|
| FAHMDZ(fahmdz.com) | Web | Claims 150k+ active users and 12k+ teachers (unverified) | Serves both students and teachers: courses, BAC exam prep, its own chatbot. Requires signup, model calls run on the server. |
| مذكّرتي(ostadi.site) | Web | Unknown | Free lesson plans and exams, exports to Word, shared library and grade analytics. Almost a free version of Ultra. |
| DzForma(dzforma.com) | Web | Calls itself "Algeria's No. 1 education platform" | Lesson plan and exam resource library plus AI tools |
| Modakira, المعلم AI, Raqmoon | Web | Unknown | Each focuses on one niche: PE lesson plans, exams, daily logbooks |
| Ready-made lesson plans from top teachers (عقبة نوي and others), circulating on Telegram and Scribd | PDF | Very large | Teachers have downloaded these directly for years. DIHEM's templates copy their formats. |
| ChatGPT and Gemini, used directly | big tech | Very large | They can write content but can't produce the official format. Formulas pasted into Word come out garbled. |

The Chrome Store's "related extensions" also show another category: plugins that help teachers enter grades into the Ministry's digital platform. SALMI TAHAR's has 10k users, and KHALED BOUCHAREB's series each have 4,000 to 10k. This shows two things: Algerian teachers do install Chrome extensions, and a local teacher plugin tops out around the ten-thousand range.

### Why it took off, and why it can't grow big

It gets three small things right: the author is a user himself and knows which format inspectors accept; formula typesetting and Word export solve a real problem for math and science teachers; and AI runs through copy-paste into free chatbots, so users pay nothing and the author pays nothing, which makes a one-time purchase viable.

But the reach comes from the author's standing in the local teacher community, not from those features. The differentiators are easy for others to copy (ostadi.site already exports to Word), while his fan base can't be taken by anyone else. For you, that means building an Algerian clone is pointless. What's worth taking is the playbook itself.

### If it were you

**In one line** : Don't compete with it in Algeria. What's worth learning is the playbook: a frontline teacher as author, official formats turned into templates, and AI run through users' free chatbot accounts. Apply it in another country with a standardized lesson-plan format, provided you have a local teacher willing to be the face of it.

**Who it suits** : you are a teacher yourself, or can partner with a teacher who has a following in their country's teaching community; your country has mandatory lesson-plan formats that inspectors check (Morocco, Tunisia, Egypt, Indonesia's RPP, Vietnam's giáo án, Turkey, etc.; inferred, formatting rules not verified country by country); and you can accept a small business that sells in a yearly back-to-school rush at a price of a dozen-plus dollars per customer.

**Who it doesn't suit** : indie developers outside the teaching community. These users only trust recommendations from fellow teachers, so cold outreach won't work. If you want a subscription SaaS aiming at large revenue, this audience has low willingness to pay, and a local plugin caps out around ten thousand users.

**How to build it** : first turn the national official lesson-plan format and two or three top teachers' layouts into templates, and get formulas and Word export right (the layer big-tech chatbots handle poorly). For the AI part, follow its approach: copy the prompt, paste the reply back, no servers, so no model costs. Keep the free tier to lesson plans and PDFs. Put exams, grading sheets, probation-review lesson plans, and Word export in a paid tier sold as a one-time purchase.

**How to get customers** : have a teacher post screen recordings on Facebook or TikTok in the local language titled "a lesson plan in one minute," naming "new teachers" in the title. Put the link in comments, with a Telegram group for support. Then offer tutoring centers a bulk discount.

**Before when** : Follow the local school calendar. In most Northern Hemisphere countries school starts in September, so the prep has to be done by 7 or August. Miss it and you wait for the next term or the next year.

**Signs you've misread it** : if the extension is still at a few hundred users in December and the author's video traction has faded, demand dies once the back-to-school window closes. Or ChatGPT or Gemini start producing editable Word documents in each country's official lesson-plan format with formulas, and the formatting layer loses its value.

[Chrome store page ↗](https://chromewebstore.google.com/detail/%D9%85%D8%B0%D9%83%D8%B1%D8%A9-%D8%A7%D9%84%D8%A3%D8%B3%D8%AA%D8%A7%D8%B0-dihem-pro-l/eakdfhkloohoodjoomammngcgcdccbpb)

**Research notes: competitor table, acquisition evidence, full research report**

Competitors

| Name | Where | Launched | Scale | How it differs from this one |
|---|---|---|---|---|
| FAHMDZ(fahmdz.com) | Web | Not verified | Claims 150k+ active users and 12k+ teachers | A broad platform for students and teachers, requires an account, model calls run on the server. DIHEM handles only teacher documents, runs locally, no key needed. |
| مذكّرتي(ostadi.site) | Web | 2026 (unverified) | Unknown | Free web-based lesson plans and exams, with a shared library. Features nearly overlap with Ultra, but there is no extension or desktop version. |
| DzForma | Web | Not verified | Calls itself Algeria's No. 1 education platform | Resource library plus AI tools, a content-platform route |
| Modakira(modakira.pro) | Web | Not verified | Unknown | PE lesson plans only |
| المعلم AI(moalem.click)/ Raqmoon | Web | Not verified | Unknown | Each focuses on exam generation or daily logbooks |
| Ready-made lesson plan PDFs (عقبة نوي, قراية ديزاد, Telegram, Scribd) | Other | Years | Big | Direct downloads of other people's lesson plans. DIHEM's templates imitate these formats, with content customized by teachers using AI. |
| ChatGPT / Gemini / DeepSeek | Big-company features | — | Big | Can write content but can't reproduce the official layout or handle formulas and Word. DIHEM only adds the layout and structure layer. |

Where users come from

- **Confirmed** **The author's own Facebook page Math (@functionLinear, about 12k followers) posts and Reels** : 2026-10-05 post announces the extension's listing (32 likes, link in comments); 2026-10-09 post launches Ultra (70 likes / 53 comments / 16 shares); 2026-10-22 video 38K views

- Inferred **Back-to-school and new-teacher probation demand** : Algerian schools start in late September, the extension was listed 9-23; the most popular video title was "for every new teacher"; it has a probation-course lesson plan feature (ترسيم)

- **Confirmed** **Multiple store listings (Chrome Web Store + Microsoft Store) and repeated renames and relaunches** : Mar "الأستاذ الذكي" → Jun free platform → Sep Dihem1 → Oct Chrome extension / Ultra; Microsoft Store 9P7D0TQ2BWM6

- **Confirmed** **B2B discount for tutoring centers** : The Ultra launch post said "7 discount for tutoring centers (سنتر)"

- Inferred **Paid ads / TikTok / X / media** : x-radar search for DIHEM returned 0; TikTok search found no relevant results; Facebook Ad Library not checked

## مذكرة الأستاذ - DIHEM PRO Lite (Chrome extension) research report

> Channel: Chrome Web Store · ID eakdfhkloohoodjoomammngcgcdccbpb · Research date 2026-11-06

### One line

A lesson-plan generator extension built by a middle-school math teacher, Dihem Abdellatif, in Biskra, Algeria. It fills lesson plans using Algeria's official conventions (second-generation curriculum "الجيل الثاني", ministry headers, styles modeled on the local teacher Okba Nouy), with live preview and PDF export. The AI part makes no API calls: it copies the prompt to the clipboard, the teacher pastes it into ChatGPT, Gemini, or DeepSeek, then pastes the reply back, which auto-fills the template. Exams, targeted homework, probation-course lesson plans (مذكرة الترسيم), and Word export are locked behind DIHEM PRO Ultra, a paid Windows app.

### Verdict

**It hasn't really taken off.** It's a free funnel a teacher influencer built to promote a paid desktop app. Users come from the Facebook page of his 12k-follower audience, riding the late-September school start and new teachers' lesson planning and probation needs. Now at 367 users, growing about 10% a week, which is organic growth on a small base. Its differentiators are three: local official templates, no API key, and data stored locally. These make it useful within local teacher circles, but not enough to lead the category, where several larger Algerian AI lesson-plan platforms already operate.

### Data

- User count (our library chromestore.item_snap, source: related-extension cards): 2026-11-01 333 → 11-02 333 → 11-03 333 → 11-05 356 → 11-07 367. Over 6 days +34, about +10%. Rating 5.0 from only 2 reviews.

- Listed 2026-09-23 (store status: published); version 2.0.0, updated 2026-10-05 (store page).

- The store's "related extensions" group it with Algerian teacher-digitization (الرقمنة) helper extensions: SALMI TAHAR AMATTI v2 (10k users), KHALED BOUCHAREB-CEM (10k), KHALED BOUCHAREB Primaire/Lycee (4,000 each), and رفيق الرقمنة (1,000). This shows Algerian teachers do install Chrome extensions, but individual extensions operate in the thousands-to-tens-of-thousands range.

### Timeline (developer's Facebook page "Math", @functionLinear, Biskra, about 12,131 followers)

| Date | Event | Engagement |
|---|---|---|
| 2026-03-20 | Video: "الأستاذ الذكي" free platform using AI to generate lesson plans, courses, and exams | 263 views. |
| 2026-06-22 | Video: free AI lesson-plan generator platform | 8.7K views / 87 likes |
| 2026-09-17 | "New Dihem1" AI-generated lesson plans | 2.5K views |
| 2026-09-23 | Chrome extension listed | — |
| 2026-10-05 | Post "مذكرة الأستاذ dihem officially accepted by the Chrome Store," framed as "PRO version completely free," link in comments | 32 likes / 14 comments / 1 shares |
| 2026-10-09 | Launch of DIHEM PRO Ultra (Windows, Microsoft Store 9P7D0TQ2BWM6), combining his earlier programs into one: 9 template sets, exams and grading sheets, probation-course lesson plans, grade entry and class analytics, annual planning, a key-free AI assistant, and Word export. A 7 discount for those enrolling via tutoring centers (سنتر). | 70 likes / 53 comments / 16 shares |
| 2026-10-10 | Video "lesson plan in one minute" | 2.3K views |
| 2026-10-22 | Video "For every new teacher: the best way to generate lesson plans for every subject with AI" | **38K views / 448 likes / 52 comments** |

Source: posts on facebook.com/functionLinear (read via r.jina.ai); follower count from search snippet "Math, Biskra. 12131 followers".

### Paid

- Lite is free; the store description says exams, targeted homework, permanent-post lesson plans and Word export require the full version, with contact info on the support page.

- On the developer's other page @dihempro ("ديهم عبد رياضيات", 27 followers), the old Dihem-Pro listed "one-time payment 2500 دج" (about $19 at the official rate). Ultra's price is not public; a commenter under the Oct 22 video asked "how much is the subscription". Another comment there says "لازم تخلص" (you have to pay), suggesting the free tier is bait and core features are paid, and users know it.

- Revenue is not public; number of paying users unknown.

### Competitors (all doing "generate lesson plans / exams from the Algerian curriculum")

| Name | Form | Launched | Scale | How it differs |
|---|---|---|---|---|
| FAHMDZ(fahmdz.com) | Web | 2025–26 (unverified) | Claims 150k+ active users and 12k+ teachers | A general platform for students and teachers (courses, BAC/BEM exam prep, DZGPT); requires an account and calls models server-side. DIHEM only does teacher documents and runs locally. |
| مذكّرتي(ostadi.site) | Web | 2026 (unverified) | Unknown | Free lesson plan and exam generation, shared library, class grade analysis; nearly overlaps Ultra's features. Its recall card says you can use your own Gemini key. |
| DzForma(dzforma.com) | Web | Not verified | Calls itself "Algeria's No. 1 education platform" | Lesson plan, course and exam resource library plus AI tools; a content-platform route. |
| Modakira(modakira.pro) | Web | Not verified | Unknown | Only PE lesson plans (2023 curriculum); vertical to a single subject. |
| المعلم AI(moalem.click) | Web | Not verified | Unknown | Focused on generating exams and knowledge summaries. |
| Raqmoon(raqmoon.com) | Web | Not verified | Unknown | A daily record notebook (كراس يومي) plus AI, trained on the second-generation curriculum and annual progress. |
| Ready-made lesson plan PDFs (عقبة نوي, قراية ديزاد, Telegram/Scribd) | Web / Telegram | Years | Very large (teachers download them daily) | Download plans others have written directly; DIHEM's templates imitate these well-known teachers' styles. |
| Use ChatGPT / Gemini / DeepSeek directly | Big-company features | — | Very large | They can write content, but can't produce the official layout, handle math formulas, or output Word. DIHEM only fills the "layout + format conventions" layer. |
| SALMI TAHAR / KHALED BOUCHAREB series extensions | Chrome | 2020–2022 | Each 4k–10k users | A different problem (assisting grade entry on the Ministry's digital platform), showing local teachers use Chrome extensions, and also showing this channel's ceiling. |

Searching "مذكر / الأستاذ / DIHEM" in the Chrome store, our library only found this one lesson plan generator extension. In the Chrome channel it has almost no direct rival, but on the web competitors are already crowded.

### Growth channels

1. **The developer's own Facebook page** (confirmed): each version update gets a post or Reels, with the link in the first comment and a request to "share with colleagues". Biggest video 38K views. Existing users also ask for features in the comments (e.g. adding a "metrics" column for the new curriculum, a French interface).

2. **Back-to-school season and new teachers** (confirmed, indirect evidence): Algerian school starts late September; the most-viewed Oct 22 video is titled "for every new teacher"; the permanent-post lesson plan (ترسيم) feature is aimed specifically at newly hired teachers facing inspectors.

3. **Multi-channel seeding** (confirmed): Chrome extension, Microsoft Store (he posted "thanks be to God, we're indexed by search engines worldwide"), two Facebook pages. From March's "الأستاذ الذكي" to June's free platform, then Dihem1 in September and now Ultra, he kept relaunching under new names.

4. **Tutoring center (B2B) discount** (confirmed): the Ultra launch post mentions a 7 discount for tutoring centers.

5. Not checked: paid ads, TikTok, X, media coverage (x-radar search for DIHEM returned 0; TikTok search for "dihem pro" had no relevant results). Facebook Ad Library not checked (not on the tracking list).

### Why people use it / its differentiation

- **It's a user itself** : the author is a front-line math teacher; the templates follow the local formats teachers trust most (ministry header, عقبة نوي style, قراية ديزاد style). Outside AI tools can't do this.

- **Zero-cost AI** : no key, no subscription; just copy the prompt into free ChatGPT/Gemini/DeepSeek. That's key for Algerian teachers with low willingness to pay; for the developer there's no model cost either, so a one-time purchase works.

- **Math formula typesetting** : rendered with KaTeX, formulas stay editable in Word export, a real pain point for science teachers (pasting ChatGPT formulas into Word gets messy).

- **Local storage, no server** : sidesteps Chrome review and privacy concerns, and implies near-zero operating cost.

- These differences convert well within the author's follower circle, but the scale-up really rode on the author's Facebook reach. The extension is just one outlet for that reach.

### Visibility

Still obscure: no public revenue, no media or X coverage. It spreads only within Algerian teachers' Facebook circles. Other platforms in the category are plentiful, but they aren't copying it; they're doing the same thing in parallel.

### Takeaways

- "A nationalized teacher document generator": use front-line teachers as authors/influencers, turn official formats into templates, connect free chatbots via "clipboard relay" for AI, achieving zero model cost and one-time purchase. This can be replicated in Morocco, Tunisia, Egypt, the Gulf states, or any country with a unified official lesson plan format (Indonesia RPP, Vietnam giáo án, Turkey, etc.).

- A free extension plus paid desktop software combo: the extension goes into the Chrome store for exposure and trust, while the paid product lives in the Microsoft Store, sidestepping Chrome store's ban on charging.

- B2B sells to tutoring centers.

### Uncertain

- Ultra's price, paying users and revenue are unknown; 2500 دج is the old Dihem-Pro price.

- User numbers cover only 6 days; whether growth came from the aftershock of the Oct 22 viral video can't be verified.

- Competitors' launch dates and real scale (FAHMDZ's self-claimed 150k) are unverified.

- Whether they ran Facebook ads was not checked.

This article was written by AI from public data and the data we collect daily. Numbers are sourced, and inferences are labeled.