There is no one definitive answer to this question as it can vary depending on a number of factors, such as the reading ability of the individual student, the difficulty of the text, and the length of the page. However, some research suggests that the average reading speed for a sixth grader is around 200 words per minute (wpm). This means that it would take a sixth grader approximately three minutes to read a page of text with 600 words.
It is important to note that this is just an average, and some students may read faster or slower than this. Additionally, some pages of text may be more difficult to read than others, which can also affect the reading speed.