My coaching doesn't provide any modules....

Just started preparing for JEE and i don't know much about study material but my coaching only gives me sheets for every topic that includes questions and they make us write notes, they say that it's enough and that's as far as their 'study material' goes. I'm thinking about getting ALLEN modules but I'm worried that i might not be able to keep up with coaching as well as other books at the same time.... What should I do in this situation? Need suggestions.