Frelling water

A check-valve is supposed to prevent water from backing up your pipes to flood into the house, right? Not demurely slip aside and let the unwanted visitor in?

Textbook Disclaimers

This textbook contains material on
evolution. Evolution is a theory, not a
fact, regarding the origin of living
things. This material should be
approached with an open mind,
studied carefully, and critically
considered.

This book contains an evolution
disclaimer sticker mandated by your
local school board. For fun, submit an
article to a local paper that probes the
motivations of board members and
analyzes the impact of weakened
science instruction on the success of
students' college applications.

Textbook Disclaimers