I'm guessing that the perpetually cranky woman who wrote my bio lab reader did not minor in English.

"There are many scientific instruments in [sic] which we can use to obtain data or information about a subject or topic [either one] we are studying."

"It is ASSUMED that you understand the metric system at this point in your educational career. If you find this is a deficiency in your knowledge-base [I don't think so, honey], it is your responsibility to seek our [sic] you [sic] TA or resources on the internet and fill in the gaps."

"Be sure your eye level is at the level of the meniscus, as [sic] if it is not, you will get and [sic] error in your reading."

She told us to email her when we find mistakes. I'm on page two, so I really don't think it'll do much good. This woman is a lost cause.