Lesson 3.1: Learning about the base 10 number system. (D2L quiz)
Vocabulary for addition and subtraction:
Addend + Addend = Sum
Minuend - Subtrahend = Difference.
Lesson 3.2: Finding out what children do and don't understand about place value
Lesson 3.3: Teaching 2-digit addition and subtraction by questioning and discussing.
Lesson 3.4: Alternate and student invented algorithms for addition and subtraction
Lesson 3.5: Teaching 2-digit addition and subtraction by demonstrating and explaining.
Assignment:
Video Assignment: addition and subtraction with manipulatives
Lesson 3.6: Extending place value: 3 digit addition
Lesson 3.7: Extending place value: 3 digit subtraction
(There may be an optional assignment for 3-digit subtraction for students who didn't score in the A/B range for the 3-digit addition assignment)
Lesson 3.8: Common student errors for addition and subtraction (D2L quiz)