Using visual models to compare teen numbers and determine which is greater or less.
Review of all teen number concepts and a final formative check-in.
Formalizing the relationship between teen numbers and equations of the form 10 + n.
Solving simple story problems involving teen numbers using the 'ten and some more' structure.
Introduction to unitizing: seeing 10 ones as 'one ten' using bundles and towers.
Breaking apart teen numbers into 'ten' and 'some more' to prepare for equation work.
