What schools? Out of what textbooks?
Biology: teachers addition by Holt, rinehart, and winston, austin, texan 2006
this book a public textbook teaches "water has properties that support life"
article 3:2, and 5:4
and what it means by that is the primordial soup theory.
but more importantly HOLT teaches in pages 254, T257
that "The miller experiment and others demonstrate that life could have formed in the "primordial soup." or very similar wording
I can quote two other textbooks as well that have this similar statements:
Glencoe page 382, 388
Prentice Hall 357, 359
sourced below:
Biggs, A. et al.,
Biology: The Dynamics of Life (Florida Edition), Glencoe/McGraw Hill, New York, 2006
pages 382, 388
Campbell, N., Williamson, and R. Heyden,
Biology: Exploring Life (Florida Teacher's Edition), Pearson Prentice Hall, Upper Saddle River, New Jersey, 2006
pages 357, 359