Ask doubts, practise what you learn, keep your notes and quizzes together, and see which topics need more work.
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A teacher has to move through the syllabus with the whole class, even when some students need more time, another example or a different explanation. Small gaps can stay with a student for months if nobody goes back to them.
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She has copied the definitions from class, but the chapter still does not make sense. Here is what happens when she opens Tcher that evening.
Ananya chooses Class 9, CBSE, Kannada and English during setup. Tcher uses this information to keep explanations relevant to what she is learning.
She can type the doubt exactly the way she would ask it, say it out loud or photograph the question from her book.
Tobi starts with an example Ananya can relate to, connects it to the textbook concept and asks her a question to check whether the explanation made sense.
Get the aluminium foil from your kitchen. Crush a piece into a tight ball, drop it in a mug of water. It sinks. Now flatten that same piece into a little boat and set it on the water. It floats. Same foil, same weight. The only thing that changed is how much water it shoves out of the way.
The water you shove aside pushes back up. That upward push is buoyant force, and Archimedes’ principle says it equals the weight of the water displaced.
Ananya can challenge the explanation or ask the same doubt another way, and Tobi continues from there instead of starting the entire lesson again.
Weight on its own never decides. It is a tug of war. The ship is huge and hollow, so before it has sunk even a few metres it has already shoved aside thousands of tonnes of water, and all of that water pushes back up. The tug of war goes even, and the ship stops sinking. The nail is tiny and solid. Fully underwater it shoves aside about a spoon of water. A spoon of water cannot hold up iron.
Displaced water weighs as much as you do → you float. Less than you → you sink.
Tobi connects the concept back to what Ananya is studying and gives her a question to solve so she can check whether she can use it on her own.
Same idea, written as one number. Relative density is your density divided by water’s. Solid iron comes to 7.8, far heavier than water, so the nail sinks. A ship is steel plus an enormous amount of trapped air, and the whole thing averages out around 0.3. Under 1 floats, over 1 sinks.
Your steel tiffin box is the same story. Lid shut, it bobs in a bucket. Open the lid, water rushes in, the air leaves, the average crosses 1, and down it goes.
R.D. below 1 floats · R.D. above 1 sinks · water is exactly 1
Tcher is built for students, with safety checks designed into the learning experience. Conversations stay connected to the student’s learning context, and the safety layer checks messages before they appear on screen.
Students can learn at their own pace, while teachers can see where the class is doing well and where students may need more support.
That is the moment we built Tcher for. Here is what students and teachers told us.
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For everyday learning and understanding.
For students who want deeper practice and more support for exams.
Bring Tcher to your students, teachers and academic teams.
Still unsure? Write to us and someone from the Tcher team will reply.
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