
#1 When someone talks about an acute angle, you'll know not to say, “oh yeah, that angle is so cute.”
#2  Knowing you’re a millionaire because you can count that high.
#3  Knowing that a factor tree is not the oak next to the school
   parking lot.
#4  Pi Day, isn't really about pie, but don't tell anyone.  
#5  Realizing that people can be like numbers: irrational, complex and perfect.
#6  Realizing that place value doesn't refer to how close
  your desk is to the vending machine. 
#7  Understanding that the distributive property has nothing
to do with real estate.  
#8  Solving word problems could lead to solving problems!  
#9 Knowing that a negative number isn't a number with an attitude
   problem!
#10  Knowing that if there are 50 students in a class then it's virtually certain that two will share the same birthday, so hope they both bring in a cake.
Create some fun lists like this with your students.