The unit focuses on STAAR TEKS objective 3.2A. This weekly unit includes 21 pages based on composing and decomposing numbers. Student must identify the differences between standard form, expanded form, and expanded notation. This unit will help student understand how to decompose and compose numbers using a place value chart and base ten blocks. This unit included two journal entries, place value chart, base ten block printable, two worksheet per day, a review and test.