Open schooling is best for students having self control and can prepare without guidance of school. If you are preparing from open schooling then my advice to you is not to get distracted. The most important benefit of open schooling is that you get much time to prepare for the exam. You should focus on your board exams too as students from open schooling has higher chances of getting distracted from boards.
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To do the best, you need the best books for preparation-
- Concepts of physics by HC Verma
- Objective questions on physics by DC Pandey
- Maths, RD Sharma
- Plane Trigonometry by S L Loney
- Complete mathematics for JEE Main TMH
- Physical Chemistry by OP Tondon
- Numerical Chemistry by P.Bahadur
- Organic chemistry by OP Tondon
Make a proper routine or timetable and devote at least 10 hours a day. During last days, focus more on the important chapters. When done with the syllabus, give mock tests regularly, and solve previous year papers also. Time management is one more important thing you should look upon.
Some important chapters you must focus on- For Physics, Rotational Motion, Thermodynamics, SHM, Electrostatics, Magnetism, Optics, Modern Physics. In Mathematics, Complex Number, Conic Section, Circle, Calculus, Vector & 3 D, Probability, Trigonometric Equation, Properties of Triangles, Quadratic Equation, Sequence and Series, Permutations and combination. In Chemistry, you can more focus on these chapters for last month preparation- Chemical bonding, Electrochemistry, Coordination compound, Salt analysis, Ionic equilibrium, Thermodynamics & thermochemistry, Aldehydes and ketones, Aromatic hydrocarbons, GOC isomerism, Liquid solutions, Alkyl halides and aryl halides. Beside this, give mock tests regularly.