The "Analyze an Issue" task assesses your ability to think critically about a topic of general interest and to clearly express your thoughts about it in writing. Each Issue topic makes a claim that can be discussed from various perspectives and applied to many different situations or conditions. Your task is to present a compelling case for your own position on the issue. Before beginning your written response, be sure to read the issue and the instructions that follow the Issue statement. Think about the issue from several points of view, considering the complexity of ideas associated with those views. Then, make notes about the position you want to develop and list the main reasons and examples you could use to support that position.
ETS explicitly states that they are looking for quality and clarity of thought and not grammar. Even though readers are not meticulously looking for grammar, as soon as you make the tiniest mistake, they will notice and it can take your score down. You can get a perfect score with an error or two, but minor grammatical errors (faulty pronouns, subject/verb agreement) can mar the quality of your essay. So do focus on your grammar & spellings. A well reasoned essay that is riddled will such basic errors will not portray a good impression of your hard work. Hence work on these minute aspects of your essays.
There is no doubt that an individual with foresight and talent can play a vital role in an enterprise. However, we cannot deny the importance of teamwork. These days, there are so many complex problems that cannot be solved by a single person. The recent Nobel Prize winners are a group or team of three of four persons as they worked together to make new inventions. Many companies when innovate new products, divide the whole task into small tasks and then integrate the whole thing to achieve the final product. That way every person in the team gets a chance to express his own unique idea. That way everybody can contribute to the enterprise. Especially, in the field of medicine, teamwork is required. New medicines invented by a single person cannot be used without the verifications and research done by the other scientists.