Wednesday's public hearing will be followed by board votes the next two days. Those will determine textbooks approved for at least eight years, beginning September 2014.
Some board members are suggesting that major edits to the proposed books to de-emphasize lessons on evolution and climate change aren't likely.
They say that even though some religious and social conservatives have long argued for inserting sufficient skepticism into academic passages on evolution and climate change.
Many of those critics see God's hand in the universe and argue evolution and global warming are only theories.
Experts, though, have warned against letting ideology trump facts.
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