Kalvi40 is a free, educational Tamil Samacheer Kalvi application for Tamil Nadu and Puducherry school children from the 3rd to 8th standard. It has been developed as an initiative by BumbleB Trust to provide free, high-quality, and relevant educational content to students in Tamil Nadu and Puducherry.

The content is presented in the form of videos, practice tests, and daily quizzes. It is based on the curriculum of the Tamil Nadu Education Board.

It is your one-stop solution for all your learning needs. Whether you are studying for the Class 3 exams or for the Class 8 exams, whether you want to learn Tamil, English, Maths, Science, or Social Science, you can learn it all here.

You will get the benefit of a simple and interactive interface, which will enable you to navigate easily through the different lessons and topics.

You can also use the practice tests and the quizzes to assess your progress and to understand the mistakes you have made at each question.