JEE Preparation

The best way for the preparation of JEE Mains along with boards is through linking their syllabus.
What one needs to know is the common aspects from the point of view of both the exams.
Most of the time, students make mistakes and study the same topic thrice from Mains perspective followed by Advanced and boards exams.
For that, take an example of thermodynamics, first read your school textbooks thoroughly then go through with your coaching notes and ask all the doubts related to your topic.
After that, go through your textbook questions, both subjective and objective.
From boards only, one has covered a lot of Mains topics because the study pattern for board involves complete analysis of the topic from root till the top.
Now, after going through boards, solve the mains MCQs if required.
Then solve your coaching or practise material for Advanced and try to relate every single topic with boards.
Please do not write your high-level solutions in the boards. Keep it simple and to the point.
The above process needs hard work but is the most used and preferred method.
Thank you.
Best of luck.

Yes, there are no restrictions on students to prepare for JEE provided they fulfil the criteria for JEE exams. The eligibility for JEE is as follows:
Basic eligibility:
Nationality: Candidates must be an Indian citizen.
NRIs, PIOs, OCIs & Foreign national candidates can also apply.
Number of Attempts: Candidates can apply for JEE Mains exam only three times. This attempt limit will be counted from 2017.
Aadhaar Card is compulsory to apply for this exam.
Age criteria:
Age limit: Candidates whose date of birth falls on or after 1st October 1993 (for general and OBC candidates) are eligible to apply.
Relaxation: If candidates belong to a reserved category like SC, ST and PwD category then the date of birth falls on or after 1st October 1988 are eligible for JEE Mains.
Candidates note down that the date of birth mentioned in the Secondary Education Board/University will be considered only for appearing in the exam.
Qualification criteria:
Qualifying exam: Candidates must qualify their 10+2 or equivalent examination from a recognized board.
Subjects: Candidates must have to take a minimum of 5 subjects in 12th/equivalent examination. Candidates appearing for JEE Mains 2018 must have passed class 12th with Physics, Chemistry & Mathematics in order to apply.
Passing marks: There is no prescribed percentage to appear in the examination. Candidates having passing marks can also apply.
Only for admission to NITs, IIITs and CFTIs, candidates should secure minimum 75% marks (65% for SC/ST students) in the qualifying examination or must be in the top 20 percentile in class 12th examination conducted by the respective boards.
Appearing candidates: If a candidate appears in class 12th or equivalent class in 2018 then he/she is also eligible for JEE Mains 2018.
NIOS candidates can also apply for this exam.
Diploma holders: To appear in JEE Advanced, a Diploma holder can apply in JEE Mains 2018, but their rank & score in JEE Mains will not be considered for admission in NITs & CFTIs.
No board marks will be taken into account for calculating JEE Mains score from the year 2017 onwards.