This document provides an overview of content from several units related to math and science concepts for young children. It discusses ordering, seriation, and patterning (Unit 17), measurement of volume, weight, length and temperature (Unit 18), and measurement of time (Unit 19). Key terms are defined for each unit and review questions are provided. Students are instructed not to submit written responses to the review questions but to read through the content and ensure they can answer the questions.