Are you sure that you’ve read that TIMSS study about our 12th grade scores? The methodology for picking the cohorts was the same in both the 8th and 12th grade
Now I understand your point. Thank you very much for clarifying it.
Please point me to the evidence that there was a national, across the board, change in the curricula between 1991 and 1995 if you believe this to be a possible explanation. Can the same be said for all of the other countries which took TIMSS?
The entire PURPOSE of an international study IS to compare different education systems to each other, which is exactly what TIMSS does. Just like the entire PURPOSE of a national study like NAEP is to make state to state comparisons to see what works and what fails. It’s not BAD to make international and national comparisons, it’s GOOD.
This is patently false. Fortunately, it’s PROVABLY false. Our OWN data from NCES claims that 74% of American 18 year olds graduate from high school, compared to more than 90% in most industrialized nations:
The reason nobody has ever posted a cite which disputes that is that there is no cite, AND TIMSS disputes it in a different direction, claiming that they found that only 63% of American students are in their “TCI”, compared to 82% in Switzerland, 84% in Norway, 75% in Germany, 88% in Slovenia, etc.
They found that 1,245,594 American children of high school graduation age, 67% of that population, weren’t even IN high school, and thus were never included in our already LOW TIMSS scores. If the worst students were the ones who weren’t in high school, can you even IMAGINE how low our scores would have been had they been INCLUDED? If this is the reason you don’t “believe TIMSS is as valid an indicator of differences between national systems as its exhorters proclaim”, you need to use your new-found knowledge to go back and rethink your position.
None of which is relevant. The entire POINT of TIMSS is to make international comparisons, not state to state comparisons. Your idea that something in our education system was the “first step in the reform process” is the same thing educators have been mimicking for years, and none of it ever worked. Furthermore, all American parents I know believe that every single one of these so-called “reforms” only brought us back quicker to the stone age and improved nothing.
TIMSS also proves how SAT scores have been politicized, feminized, manipulated, and watered down to the point they’re no longer credible.
This is not complicated stuff. Really. – DvF
Pretty smart, eh? What have our educators done lately to top that?
“For another view of it, let’s look at your classroom. In a large lecture class, grades tend to be distributed “normally”. This being the case, “curving” (with its true meaning) would assign Cs to the 68% of the students whose scores are within 1 SD of the mean. So, let’s assume that the mean on Test 1 was 75 with a standard deviation of 8. So, any student with a score between 67 and 83, inclusive, should get a C. However, Susie with her 81 and Johnny with his 69 both got Cs! Is the difference significant? We don’t know until we run tests on the scores. Even though the difference is 12 points (which is 1.5 SD), it is likely that this difference is NOT “statistically significant” at any appreciable level. To constantly quote raw numbers with no test results is worthless and misleading. Even those with an agenda don’t do this because they know they will be accused of trying to bamboozle the people reading the report.”
You complain about referring to different cohorts, then launch into a comparison between a large lecture room and an international study of hundreds of thousands of students.
You CANNOT compare these and make any sense out of it. You literally can’t adjust for guesses on multiple choice questions in the “large” lecture hall, but you CAN when there are hundreds of thousands of students taking the SAME test in their own languages. Do you know what TIMSS is? Before you invite anyone to “take a statistics class” again, you ought to invite yourself to examine their methodology. You are as wrong about this as you are about “In the US, we send the vast majority of our students to high school”.