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It seems to me that we're talking about the AR ATOS levels while we may not all know very much about it. So I went looking this morning. Some of this I had read a couple of years ago when we switched to the ATOS levels and some of it is new to me. Renaissance Learning didn't develop ATOS on their own. ATOS was developed with the folks at TASA (who came up with Degrees of Reading Power) and other reading experts (whom I can't find listed anywhere on their website :/). I learned this morning that ATOS stands for Advantage-TASA Open Standard. It's based on research involving 30,000 students and 950,000 books. I found the abstract for this report from http://research.renlearn.com/research/55.asp interesting: Development and implementation of the new Advantage-TASA Open Standard (ATOS) Readability Formula for Books is detailed in this paper. ATOS is a better tool than other readability formulas to help teachers match students to books due to the following characteristics: 1) ATOS employs the three statistics found most predictive of reading difficulty: words per sentence, characteristics per word, average grade level of words. 2) ATOS includes statistics on actual student book-reading, not just data based on short test passages. 3) ATOS takes book length into account in determining book difficulty. 4) ATOS more accurately levels "high-low" books, emergent-reader and nonfiction books. 5) ATOS uses whole-book scans instead of samples, significantly increasing accuracy. http://www.renlearn.com/ar/ReadabilityBrochure.pdf has a brief discussion about the difference between readability and interest levels, among other things. http://research.renlearn.com/research/pdfs/62.pdf has a report comparing ATOS to other leveling formulas. To address Tony's concern about non-fiction -- levels for non-fiction books, particularly in science, will be higher because of the jargon necessarily contained in them. This is true for all of the readability formulas that I'm aware of. When we switched to the ATOS levels from Flesh-Kincaid, many of our non-fiction books went down. AR believes ATOS more accurately levels non-fiction than any others. More information on this can probably be found in the report abstracted at the first website I listed above, but I wasn't able to find anything more concrete online. I'm not at all sure we have a misuse of leveling going on. What would the original poster(s) suggest we do instead? No leveling formula is perfect, but they do help us in helping students to find materials they can be successful reading. The point of AR, for me, is to get students reading for fun. I have two graduate degrees and therefore read above high school level, but I don't read books at the upper grade levels when I am reading for pleasure. I don't want to work that hard. Most of my friends in the "real" world don't either! I don't see why I should force 11th graders to read 11th grade material for leisure reading when I don't. Anyhow my 2 cents and some info to chew on, :) Julie Julie Anderson, Librarian Liberty High School, Renton, WA 425.837.4901 andersonj@issaquah.wednet.edu "Fiction is a lie about the truth." Jane Chambers =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-==-= All postings to LM_NET are protected under copyright law. To quit LM_NET (or set-reset NOMAIL or DIGEST, etc.) send email to: listserv@listserv.syr.edu In the message write EITHER: 1) SIGNOFF LM_NET 2) SET LM_NET NOMAIL or 3) SET LM_NET DIGEST 4) SET LM_NET MAIL * Please allow for confirmation from Listserv. For LM_NET Help see: http://ericir.syr.edu/lm_net/ Archives: http://askeric.org/Virtual/Listserv_Archives/LM_NET.shtml See also EL-Announce for announcements from library media vendors: http://www.mindspring.com/~el-announce/ =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=-=