6th, 7th, 8th, 9th or 10th are the standards in which the student gets an introduction of the various topics that will be explored in higher classes. With the basic foundation got right, the understanding of the concepts will get extremely easier in higher classes.
When the child crosses the barriers by solving questions similar to the pattern asked in IIT JEE/NEET, the student is getting ready for the upcoming entrance. IIT JEE/NEET Foundation coaching classes are designed to teach the important concepts in the most lucid manner. They have also been designed keeping in mind the syllabus of the foundation classes from 6th to 10th so that a student can relate to the topics better.