4.5 stars -- This is my new favorite of the Polk Street School series, and while I am still NOT a fan of the once-mentioned (in this) fat girl and bed-wetting boy, the rest compensated in this one. "Snaggle Doodles" is Emily Arrow's made up saying for "being happy or mad or anything else you want to apply it to." And she says it quite frequently in this story. The plot involves Linda Lorca's leading Emily, Alex, and Matthew in an invention group, and after they resolve their group issues (way to go, them!), they make a great robot! Ms. Vincent, the student teacher, also gets married at the end, and what does she say to Emily as she is walking down the aisle? "Snaggle Doodles!"