Skills Grammar lessons

Grammar rules, taught with examples and practice questions.

Name the rule, the language being learned and your learners’ language, or paste your own practice questions, and Chasca makes a lesson on a teacher’s board: the pattern, two or three examples, the mistake learners usually make, then each practice question solved by its signal word, with the wrong options ruled out. Made for language teachers and tutors, it explains in your learners’ language while every example stays in the language they are learning and is read in it.

Make a grammar lesson video Watch the full video

16:9, widescreen
1 minute to 30 minutes
Language teachers, tutors and channels

Made from this prompt: “Teach since and for with the present perfect to intermediate learners, then 4 fill-in-the-gap questions with options.”

At a glance

What you get.

Format: 16:9, widescreen
Length: 1 minute to 30 minutes
Starts from: A rule and the two languages, or your own practice questions, typed or as photos, a PDF or a document (up to 20 pages)
Languages: Explained in any of the 79 languages, with examples kept in the language being learned
Look: A black board or a whiteboard, the rule as a pattern, a table of forms when it helps and wrong options struck out
Narration: Any of the 30 narrators or your own voice, with captions
Price: Uses your plan’s minutes like any video, from $9.99 a month for 30 minutes. Your first 2 videos are free, up to a minute each.

Who it’s for

Made for people who teach a language.

Language teachers

Send the class home with today’s rule explained in their own language, and five practice questions solved by it.

ESL and language tutors

Explain since and for, or ser and estar, in your learners’ first language, with every example kept in the language they are learning.

Language channels

Publish a rule a day with practice at the end, explained in the language your viewers already speak, without filming yourself.

Why a skill

A general video maker doesn’t know which language to teach in.

Ask a general AI video tool for a grammar lesson and you get slides read in one language, often with the examples translated away. Learners need the rule explained in a language they understand and the examples kept in the one they are learning. This skill keeps the two apart, and solves every practice question by the rule it has just taught.

The rule comes first: what it is for, the pattern, two or three examples with the part that changes named, and the mistake learners usually make.
The rule is written on the board as a short pattern, such as “have/has + past participle”.
In a gap-fill, the signal word that decides it, such as “since” or “yesterday”, is underlined as it is named, and the right form fills the gap.
Wrong options are struck out one by one as the narrator rules them out, and the full correct sentence is said.
Explained in your learners’ language, while examples, gaps and options stay in the language being learned, exactly as written, and are read in it.
A table of forms is drawn when the rule is a pattern, such as a conjugation or articles by case, and parsing goes one word at a time with its role.
Every practice question is solved a second time on its own. If the two disagree, the video’s page tells you which question to check.

How it works

From a grammar rule to a lesson with practice.

1
Name the rule, or paste questions

The rule, the language being learned and your learners’ language, or your own practice questions.
2
The rule comes first

The pattern, two or three examples and the usual mistake, explained in your learners’ language.
3
Practice, solved by the rule

Each question is solved by its signal word, and the wrong options are ruled out by name.
4
Two languages, each read right

Examples stay in the language being learned and are read in it, inside natural teacher talk.

Examples

Videos made with this skill.

Since and for, then four practice questions
One rule taught with examples, then fill-in-the-gap questions solved by it, each option checked.
PromptTeach since and for with the present perfect to intermediate learners, then 4 fill-in-the-gap questions with options.
Made from a promptGrammar lessonsEnglish
El present perfect, explicado en español
English grammar taught in Spanish, the learners’ own language, with practice questions.
PromptTeach the present perfect to Spanish speakers, then 5 practice questions
Made from a promptGrammar lessonsSpanish
The French passé composé with être
Taught to English speakers: which verbs take être, the pattern and the agreement endings, then practice questions with each mistake found and put right.
PromptExplain the French passé composé with être to English speakers, with practice
Made from a promptGrammar lessonsEnglish
The German accusative after für, ohne and gegen
One rule taught to English speakers, the articles that change and the ones that don’t, then four questions with every option checked.
PromptTeach the German accusative after für, ohne and gegen, then 4 questions
Made from a promptGrammar lessonsEnglish
إعراب: كان الجوُّ جميلاً
Arabic grammar in Arabic: what kāna and her sisters do to a sentence, then the sentence parsed word by word, right to left.
Promptإعراب جملة: كان الجوُّ جميلاً، مع شرح كان وأخواتها
Made from a promptGrammar lessonsArabic
अंग्रेज़ी में a, an और the
English articles taught to Hindi speakers in Hindi: the sound that picks a or an, when to say the, then four practice questions.
Promptहिंदी बोलने वालों को अंग्रेज़ी के a, an और the सिखाइए, फिर 4 अभ्यास प्रश्न
Made from a promptGrammar lessonsHindi

What it won’t do

Change a word of your sentences.
Translate the examples your learners must learn.
Use two voices: one narrator reads both languages.

Why we built it

A grammar rule explained only in the language being learned is hardest to follow for the learners who need it most. Teachers who explain in their learners’ own language know it works, but writing a lesson with practice for every rule in a course takes hours. We built the grammar skill so a rule can be explained in one language and practised in the other.

Read why we built it

FAQ

Questions, answered.

Something else? The main FAQ covers voices, languages and the API.

Yes. Chasca’s Grammar lessons skill makes a narrated lesson on a teacher’s board: the rule with its pattern, two or three examples and the usual mistake, then practice questions solved by the rule, with the wrong options ruled out. Name the rule and the two languages, or paste your own questions.

Yes. The lesson is explained in your learners’ language, and every example, gap and option stays in the language being learned and is read in it. A lesson on the English present perfect narrated in Spanish, and one on ser and estar narrated in English, both read their examples word for word.

Yes. Name only the rule and it writes four to six practice questions of the kind you ask for, at your learners’ level. Paste your own and they are used exactly as written.

Yes. Parsing goes one word at a time, each with its role and the reason for it, and a tree can show the sentence’s structure. French agreement and German cases are worked the same way.

A lesson can be explained in any of the 79 languages Chasca narrates in, with the examples, gaps and options kept in the language being learned. One narrator reads both languages.

From one minute to 30 minutes on a paid plan; the free videos are up to a minute. A lesson grows with its practice questions, each on its own board.

Your first 2 videos are free, up to 1 minute each, watermarked. No card required. A skill works on the free videos too, up to a minute. After that, plans start at $9.99 a month for 30 minutes. See pricing.

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Your first 2 videos are free, up to 1 minute each, watermarked. No card required. Full product, every voice and style included.

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Grammar rules, taught with examples and practice questions.

What you get.