31 October 2015 - Twitter @education_us

"TIL Teaching with Calvin and Hobbes, one of the rarest pieces of C&H memorabilia..."

https://twitter.com/education_us/status/660599783229251588

8 September 2015 - Twitter @randymeeks

"270. Solo 8 bibliotecas del mundo tienen un ejemplar de 'Teaching with Calvin and Hobbes'."

* * *

"Es un libro educativo para el que Watterson licenció algunas tiras y del que se editaron muy pocas copias."

https://twitter.com/randymeeks/status/641296897102249985

17 July 2015 - Twitter ‏@mattlibrarian

"I have learned that there was a school text book called Teaching with Calvin & Hobbes and am sad because I will never own a copy"

https://twitter.com/mattlibrarian/status/622042871324123137

11 July 2015 - Twitter @vegatoribiove

"Teaching with Calvin and Hobbes Bill Watterson 1993"

https://twitter.com/vegatoribiove/status/620082515596984320

29 June 2015 - Twitter @coldtusker

"Google "Teaching with Calvin and Hobbes” … Amazing."

https://twitter.com/coldtusker/status/615499114369929216

9 June 2015 - Twitter @tomverse

"the Calvin and Hobbes textbook. #WhatISpentMyStudentLoanOn"

https://twitter.com/tomverse/status/608183639915012097

14 November 2013 - Twitter @anjumahmed

"Just look at the price."

https://twitter.com/anjumahmed/status/401114160483667968

28 October 2013 - Twitter @_RobRob

"Watterson licensed a "Teaching with Calvin and Hobbes" school book? I GOTTA GET ME ONE OF THO--- oh ... wow"

https://twitter.com/_RobRob/status/394911215102595072

1 September 2013 - Twitter @djsjollema

"schoolboek 'Teaching with Calvin and Hobbes'"

https://twitter.com/djsjollema/status/374067851629301762

29 August 2013 - Twitter @joekeatinge

"There was also those postage stamps and the really rare educational guide, Teaching With Calvin & Hobbes."

https://twitter.com/joekeatinge/status/373179365355290625

17 July 2013 - Twitter @ca_london

"Somebody want to buy me this: Teaching with Calvin and Hobbes?"

* * *

"...that is a rare book!!"

https://twitter.com/ca_london/status/357639045259591680

21 June 2013 - Twitter @anoobrazak

"wishlist updated-
new addition- 'TEACHING WITH CALVIN AND HOBBES'
#CalvinAndHobbes"

https://twitter.com/anoobrazak/status/348150692885716992

12 February 2013 - Twitter @davedittell

"expand that into an entire grammar workbook. btwn that & Teaching W/ Calvin & Hobbes our educational system can still be saved"

https://twitter.com/davedittell/status/301433193763069952

5 February 2013 - Twitter @HakesAmericana

"Written by a speech-language pathologist and a learning disabilities educator, 'Teaching with Calvin and Hobbes'..."

https://twitter.com/HakesAmericana/status/298857239123464193

19 January 2013 - Twitter @hjghassell

"Just requested this from inter-library loan.  Think it will come?"

https://twitter.com/hjghassell/status/292764813774422016

5 January 2013 - Twitter @tilmobile

"TIL a Calvin & Hobbes textbook was sold for US$10 000 in 2009."

https://twitter.com/tilmobile/status/287679620709494784

3 December 2012 - Twitter @REasther

"Bad news for fanatical completists: Watterson-sanctioned textbook 'Teaching with Calvin and Hobbes'"

https://twitter.com/REasther/status/275556717373317120

9 May 2012 - Twitter @DearMrWatterson

"Wow."

https://twitter.com/DearMrWatterson/status/200229030182658049

14 January 2012 - Twitter @SlipOnShoes

"The one thing that would complete the collection..."

https://twitter.com/SlipOnShoes/status/158296287840702464

13 August 2010 - Twitter @linkcrawler

"Teaching with Calvin and Hobbes... #Comics_"

https://twitter.com/linkcrawler/status/21072090358