Ready, Set, 100th Day! by Nancy Elizabeth Wallace

Another fun yet informative book by Ms. Wallace.  Minna has to create a project that portrays the number 100 for her 100th Day celebration at school.  After a lot of thought, she comes up with creative idea.  Mathematical concepts like counting by 5's, 10's , 20's, 25's, and 50's are shown.  Readers can find 10 groups of ten in Minna's  poster.