The questioner's user page identifies him as an American, so he is presumably asking about the American middle school (grades 6-8) system. Some of the responses so far seem to me to be pretty far away from this, so I am enclosing a link to the NCTM standards for grades 6-8:

http://standards.nctm.org/document/chapter6/index.htm

Note: I didn't see anything about "real numbers" in here, although that doesn't mean that a discussion of real numbers would necessarily be inappropriate. These are intended to be minimal standards.

The questioner's user page identifies him as an American, so he is presumably asking about the American middle school (grades 6-8) system. (In other words, most entering middle school students will be 11 years old, and most departing middle school students will be either 13 or 14.) Some of the responses so far seem to me to be pretty far away from this, so I am enclosing a link to the NCTM standards for grades 6-8:

http://standards.nctm.org/document/chapter6/index.htm

Note: I didn't see anything about "real numbers" in the above link, although that doesn't mean that a discussion of real numbers would necessarily be inappropriate. These are intended to be minimal standards. (Still, realistically speaking, even these minimal standards are, on average, a long way from being met.)