This is a really good service I bought a plan for 11th and 12th grade PCM there are two methods of learning here online and offline I choose the offline option and they delivered the sd card in which all the lesson was preloaded but that video lessons can only be opened by their application byjus premium. Content is really good and the way of teaching is much more effective than a 2D black-board classroom more importantly if you want to visualise something in 3D say a tetrahedral crystal you can’t do that on your regular classroom but in videos in a very effective way they also have a test section in which one can take chapter wise test abd if you ever stuck in some concepts or in a question post it on their website or you can call them and have your doubts solved if you want to learn this is the best site in the market