We began Topic 17 today, “Subtraction Facts to 18”. We worked through the introduction activities together which involved “Review What You Know” problems. We also read and discussed the “My New Math Words”, which focused on “related facts” and “fact family”. We then moved on to Lesson 17-1, “Using Related Facts”. We began the lesson with generating our own addition sentence and then writing the applicable subtraction sentence using the same numbers. We then worked through the Guided Practice and Independent Practice sections in which we discussed and completed problems in which we looked at the whole and its two parts to create the addition fact and related subtraction fact. Finally, we read and completed the problem solving work on the back page. This included a word problem which required Gracyn to take the information given and generate the appropriate addition and subtraction sentences.