Studying is a kind of art where you have to learn things after teaching in the school, you need to read and write, understand and be able to reproduce the contents either in the classwork or to help a friend regarding the particular subject. Focus more on the school subjects and try to avoid using the tab, mobile or computer that does not fetch proper education during the board exams.
Yes its possible to avoid being an excessive daydreaming in a particular activity. Talk to friends and parents inorder to avoid those bothering academic and vocational functioning.
Wake up early in the Morning and start reading one of the subject your like in the form of book, and should be alble to do the Listening, reading, writing and speaking either with the help of your friend or your parent, teacher.
Either Ask for a home tuition teacher or find a tuition center near your home who should be able to make you
interest in those two subjects in the morning and evening.
Focus more on text book instead of the computer,tab, or mobile phones. Since these create a lot of diversion in all the ways nowadays for most of the children.
Read the subject one by one ,read and write and practice well the questions given at the back of each unit.Practice Maths with the help of a teacher and keep practicing them and get corrected then and there inorder to understand you can do the subjects.
First read to understand, then try to reproduce either by studying loudly and then writing it on note, this gives your proper understanding of the subjects. Rewrite without seeing those subject then you are strength and weakness in the subject will be revealed and the teacher will be able to understand what mistake you are making and correcting them then and there.
Take regular breaks, have small walks inside your house or garden in order to increase the concentration.
Do some sort of physical exercise in order not to get concentrated too much on one activity. Do some
physical works like keeping the books neat, and cleaning your room, this gives a diversification and
gives multiple responsibility instead of focusing on one activity.