This book addresses the changing nature of language acquisition and assessing the degree of awareness of grammatical structures and mastery of the four language skills (listening, speaking, reading and writing). The method of data analysis for this book is descriptive i.e statistical analysis. In "Assessing the Knowledge of English Grammatical Structures at the Primary School Level: A case Study of Schools in Awgu", will fill the gap that exists at the present time between the trainers' and trainee's of second language acquisition (L2). It is well-planned and systematic and should form a very useful text-book for primary, secondary and tertiary institutions for students, teachers and lecturers especially in the areas of grammar and syntax. The theoretical and empirical studies used in this book help to solve the sociolinguistic factors and frequent occurrence of errors in a speech community. After going through this book, one will realize that errors are viewed by some people as positive and by other as negative. Some see them as deviance from the norms of the target language while others see them as evidence that the learner is advancing towards the target language.