Tired of spending countless hours searching and printing math worksheets for IEP or RTI monitoring? Look no further! This packet offers 20 monitoring probes focusing on three digit addition problems without regrouping. Each probe offers four math problems for students to complete and allow students to practice skills needed as part of the CCSS 2.NBT.B.7 standards. Although this standard is part of CCSS 2.NBGT.B.7, it can be use with any student needing to work on three digit addition without regrouping.