This complete Grade 4 addition and subtraction unit includes 13 lessons aligned with the Ontario and BC math curriculum and designed for Canadian classrooms. The resource provides detailed lesson plans, collaborative math activities, printable worksheets, word problem practice, and a summative unit test to support instruction, practice, and assessment. Students begin by mastering addition and subtraction within 1,000 before progressing to multi-digit operations within 10,000. The unit emphasizes