Addition
https://www.educreations.com/lesson/view/addition-method-subtotals/32196715/?s=rWG0FX&ref=link
https://www.educreations.com/lesson/view/addition-method-groups-above/32196215/?s=CxQghC&ref=link
Subtraction
https://www.educreations.com/lesson/view/subtractionungrouping/32198908/?s=BMIX2j&ref=link
https://www.educreations.com/lesson/view/subtraction-ungrouping-with-zeros/32197770/?s=WuK5hP&ref=link
Multiplication
1 digit x 2 digit Methods:
https://www.educreations.com/lesson/view/multiplication-1digitx2digit-algebraic-notation/32204164/?s=3Z0ZId&ref=link
https://www.educreations.com/lesson/view/multiplication-2digitx1digit-expanded-notation/32204117/?s=OElZT0&ref=link
https://www.educreations.com/lesson/view/multiplication-2digit-x-1digit-place-value-squares/32204070/?s=ShL1OT&ref=link
https://www.educreations.com/lesson/view/multiplication-partial-products-short-cut-methods/32204622/?s=8AJpv9&ref=link
1 digit x 3 digit Methods (these are the same methods, just
different sized numbers):
https://www.educreations.com/lesson/view/multiplication-1digitx3digit-all-methods/32204296/?s=NyYzTR&ref=link
2 digit x 2 digit Methods (again, these are the same
methods, just different sized numbers)
https://www.educreations.com/lesson/view/multiplication-2digitx2digit-place-value-squares/32204383/?s=ig7sCQ&ref=link
https://www.educreations.com/lesson/view/multiplication-2digitx2digit-expanded-notation/32204498/?s=FYyd0Y&ref=link
https://www.educreations.com/lesson/view/multiplication2digitx2digit-algebraic-notation/32204557/?s=K77kWa&ref=link
https://www.educreations.com/lesson/view/multiplication-2digitx2digit-partial-products-shor/32204701/?s=Y2K8pV&ref=link
Division
Methods:
https://www.educreations.com/lesson/view/digit-by-digit-division/34598876/?s=Sm2MtK&ref=link
https://www.educreations.com/lesson/view/expanded-notation-division/34598857/?s=8PNfAU&ref=link
https://www.educreations.com/lesson/view/place-value-sections-division/34478764/?s=5MzXVo&ref=link
Story Problems:
https://www.educreations.com/lesson/view/division-story-problem/32205083/?s=9UIGIL&ref=link
Fractions
Comparing Fractions:
https://www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-fractions-topic/cc-4th-comparing-fractions/v/comparing-fractions-with-different-denominators
Equivalent Fractions:
https://www.khanacademy.org/math/arithmetic/fractions/visualizing-equivalent-fractions/v/visualizing-equivalent-fractions
Word problems with Fractions:
https://www.khanacademy.org/math/arithmetic/fractions/visualizing-equivalent-fractions/v/equivalent-fraction-word-problem-example
Measurement
Conversions:
https://www.khanacademy.org/math/pre-algebra/rates-and-ratios/unit_conversion/v/converting-pounds-to-ounces
