Mathematics especially Algebra is the most essential subject throughout the school life that determines the future career selections of students. However, together with its advantages mathematics will cause so many disadvantages for individuals if it is not dealt with correctly. Mathematical misconceptions mainly algebra misconceptions that are the most important obstacles in the development of mathematical understanding, appears to be the main problem in successful progress of individuals in their mathematics education. That''s why mathematical misconceptions are very important. With this book in your hand you will find a categorization of the misconceptions of students in Algebra. Also the effects of the attitudes of students in their learning mathematics and having misconceptions. This book can be used by all middle school teacher to have an insight related to Algebra misconceptions.