Not really true. Some of those countries might be more comparable to states based on their size. And some may have complete national control of their schools, vs. our more state-by-state model here.
There are several different kind of rankings of graduation rates at this page about halfway down. I’ll post the high school graduation rates. They appear to be all over the map by liberal/conservative standards. Both California and Texas are almost dead last. None of this is measuring what the kids actually knew when they graduated though.
http://voices.yahoo.com/state-education-rankings-graduation-rates-high-6357074.html
State Education Rankings: High School Graduate or Higher
1. Minnesota (91.2%)
2. Wyoming (90.9%)
3. (tie) Alaska (90.6%); Montana (90.6%)
5. New Hampshire (90.4%)
6. Utah (90.3%)
7. Vermont (90.3%)
8. Iowa (89.7%)
10. Hawaii (89.5%)
11. Washington (89.4%)
12. Maine (89.3%)
13. (tie) Kansas (89.0%); South Dakota (89.0%)
15. (tie) North Dakota (88.9%); Wisconsin (88.9%)
17. Colorado (88.6%)
18. Massachusetts (88.3%)
19. Connecticut (88.2%)
20. Oregon (88.0%)
21. Idaho (87.8%)
22. (tie) Maryland (87.6%); Michigan (87.6%)
24. (te) New Jersey (86.9%); Ohio (86.9%); Pennsylvania (86.9%)
27. Delaware (86.7%)
28. Virginia (85.8%)
29. (tie) Illinois (85.7%); Missouri (85.7%); Indiana(85.7%)
32. Oklahoma (85.0%)
33. Florida (84.9%)
34. New York (84.2%)
35. Nevada (83.8%)
36. Arizona (83.6%)
37. Georgia (83.1%)
38. Rhode Island (83.0%)
39. North Carolina (82.9%)
40. Tennessee (82.4%)
41. South Carolina (82.3%)
42. New Mexico (82.0%)
43. West Virginia (81.4%)
44. Arkansas (81.3%)
45. Alabama (80.9%)
46. Kentucky (80.4%)
47. Louisiana (80.3%)
48. California (80.2%)
49. Texas (79.1%)
50. Mississippi (78.7%)
Where are the other seven states? :-)