Unit 1 Adapted Spelling Test for 2013 Pearson Reading Street. This document includes an adapted spelling test for each of the 6 weeks in the 1st grade Unit 1 book. Along with the student test, there is an answer document included as well. This adapted test is used for students that are struggling in identifying letters when given letter sounds. This test is adapted for those students that are identified with exceptionalities as well as those on the Tier 2/3 level.