| TagURLs Rank |
U.S. Rank |
Tag Count |
Website |
| 1 | 246 | 1,972 | howstuffworks.com (go to site) |
| 2 | 7 | 136 | wikipedia.org (go to site) |
| 3 | 20 | 135 | answers.com (go to site) |
| 4 | 68,045 | 1,514 | moodle.org (go to site) |
| 5 | 29 | 8 | irs.gov (go to site) |
| 6 | 86,611 | 1,490 | oedb.org (go to site) |
| 7 | 43 | 35 | webmd.com (go to site) |
| 8 | 197,296 | 862 | quizlet.com (go to site) |
| 9 | 53 | 10 | classmates.com (go to site) |
| 10 | 376,984 | 791 | textbookrevolution.org (go to site) |
| 11 | 88 | 24 | ed.gov (go to site) |
| 12 | 27,760 | 583 | flashcardexchange.com (go to site) |
| 13 | 136 | 155 | discovery.com (go to site) |
| 14 | 29,733 | 543 | cnx.org (go to site) |
| 15 | 132 | 3 | reunion.com (go to site) |
| 16 | 2,504 | 538 | starfall.com (go to site) |
| 17 | 159 | 49 | findarticles.com (go to site) |
| 18 | 260,051 | 440 | ocwconsortium.org (go to site) |
| 19 | 168 | 139 | pbs.org (go to site) |
| 20 | 160 | 21 | medicinenet.com (go to site) |
| 21 | 238,513 | 418 | curriki.org (go to site) |
| 22 | 5,467 | 410 | investopedia.com (go to site) |
| 23 | 169 | 15 | mayoclinic.com (go to site) |
| 24 | 52,273 | 384 | scitoys.com (go to site) |
| 25 | 405 | 277 | sparknotes.com (go to site) |
| 26 | 51,208 | 383 | edublogs.org (go to site) |
| 27 | 173 | 3 | nick.com (go to site) |
| 28 | 178 | 38 | bbc.co.uk (go to site) |
| 29 | 25,490 | 365 | videojug.com (go to site) |
| 30 | 5,266 | 360 | brainpop.com (go to site) |
| 31 | 185 | 9 | allexperts.com (go to site) |
| 32 | 568 | 255 | funbrain.com (go to site) |
| 33 | 274 | 54 | thinkquest.org (go to site) |
| 34 | 26,127 | 349 | studygs.net (go to site) |
| 35 | 322 | 109 | britannica.com (go to site) |
| 36 | 328 | 120 | ehow.com (go to site) |
| 37 | 1,782 | 304 | livescience.com (go to site) |
| 38 | 466,509 | 323 | weblogg-ed.com (go to site) |
| 39 | 12,760 | 309 | w3schools.com (go to site) |
| 40 | 295 | 24 | infoplease.com (go to site) |
| 41 | 317 | 13 | noaa.gov (go to site) |
| 42 | 408,422 | 280 | oercommons.org (go to site) |
| 43 | 2,303 | 246 | exploratorium.edu (go to site) |
| 44 | 7,487 | 271 | eduref.org (go to site) |
| 45 | 512 | 183 | greatschools.net (go to site) |
| 46 | 334 | 9 | nps.gov (go to site) |
| 47 | 347 | 75 | nationalgeographic.com (go to site) |
| 48 | 337 | 8 | healthline.com (go to site) |
| 49 | 338 | 15 | cdc.gov (go to site) |
| 50 | 426 | 127 | pbskids.org (go to site) |
| 51 | 345 | 11 | consumerreports.org (go to site) |
| 52 | 379,620 | 243 | how-to-learn-any-language.com (go to site) |
| 53 | 361 | 26 | nasa.gov (go to site) |
| 54 | 70,757 | 240 | footnote.com (go to site) |
| 55 | 14,802 | 238 | intute.ac.uk (go to site) |
| 56 | 445 | 106 | thefreedictionary.com (go to site) |
| 57 | 376 | 38 | kidshealth.org (go to site) |
| 58 | 372 | 10 | tickle.com (go to site) |
| 59 | 395 | 34 | utexas.edu (go to site) |
| 60 | 287,409 | 235 | elgg.net (go to site) |
| 61 | 38,278 | 230 | edutopia.org (go to site) |
| 62 | 409 | 44 | umich.edu (go to site) |
| 63 | 424 | 65 | scholastic.com (go to site) |
| 64 | 52,546 | 218 | educause.edu (go to site) |
| 65 | 125,425 | 212 | merlot.org (go to site) |
| 66 | 159,692 | 210 | laptop.org (go to site) |
| 67 | 846 | 147 | edhelper.com (go to site) |
| 68 | 414 | 9 | enchantedlearning.com (go to site) |
| 69 | 314,508 | 202 | edubuntu.org (go to site) |
| 70 | 1,191 | 160 | factmonster.com (go to site) |
| 71 | 497 | 71 | loc.gov (go to site) |
| 72 | 53,768 | 199 | iste.org (go to site) |
| 73 | 416 | 4 | babycenter.com (go to site) |
| 74 | 464 | 52 | harvard.edu (go to site) |
| 75 | 126,876 | 198 | sutree.com (go to site) |
| 76 | 4,722 | 185 | education-world.com (go to site) |
| 77 | 459 | 37 | berkeley.edu (go to site) |
| 78 | 286,282 | 197 | alice.org (go to site) |
| 79 | 3,308 | 172 | ipl.org (go to site) |
| 80 | 444 | 8 | classesusa.com (go to site) |
| 81 | 883 | 130 | wikihow.com (go to site) |
| 82 | 720 | 103 | urbandictionary.com (go to site) |
| 83 | 186,813 | 196 | chinesepod.com (go to site) |
| 84 | 3,327 | 172 | gutenberg.org (go to site) |
| 85 | 444,860 | 194 | freetechbooks.com (go to site) |
| 86 | 37,669 | 193 | open.ac.uk (go to site) |
| 87 | 590 | 64 | m-w.com (go to site) |
| 88 | 471 | 17 | cornell.edu (go to site) |
| 89 | 16,862 | 180 | wannalearn.com (go to site) |
| 90 | 477 | 12 | uiuc.edu (go to site) |
| 91 | 594 | 52 | mit.edu (go to site) |
| 92 | 545 | 30 | bookrags.com (go to site) |
| 93 | 502 | 12 | beliefnet.com (go to site) |
| 94 | 303,051 | 176 | downes.ca (go to site) |
| 95 | 562 | 22 | suite101.com (go to site) |
| 96 | 65,283 | 170 | citeulike.org (go to site) |
| 97 | 623 | 37 | stanford.edu (go to site) |
| 98 | 1,272 | 116 | bartleby.com (go to site) |
| 99 | 141,584 | 168 | sakaiproject.org (go to site) |
| 100 | 1,051 | 97 | si.edu (go to site) |
