Well, I found the names of many textbooks that still push Haeckel's Embryonic Theory as proof for evolution. Here are some of them.
Vertebrates, Kenneth V. Kardong, 1998, ISBN 0-697-28654-1, McGraw-Hill
Evolutionary Biology, Douglas J. Futuyma, Third Edition, 1998 ISBN: 0-87893-189-9
Fundamental concepts of Biology, Nelson Robinson, Boolootian, 1970, p279, isbn: 75-100329
Biology, James M. Barrett, 1986 edition, Prentice-Hall, p 754
BIOLOGY - The Living Science by Miller and Levine (Lion)
BIOLOGY (Elephant)
1999
Biology, Miller and Levine Prentice Hall, 2000 Edition, p283
"The Way Life Works"
Hoagland & Dodson
1995
These textbooks are still in use and promote Haeckel's drawings even though the drawings were proven false 120 years ago. So Markus and Hannah, I'm holding you to your word. Protest away.