Curated OER
Addition/Subtraction Strategies
Third graders recall all their addition and subtraction facts to 20. They use the relevant number strategy with whole numbers. Students are taught place value in relation to decimals, and identify 'which decimal is larger.' They...
Curated OER
Big Magic Squares
Students discover that magic squares are interesting objects in both mathematics proper and in recreational mathematics. So they are objects that students should have heard about and experienced.
Curated OER
C is for Cookie-A MEAN-ingful Graphing Activity
Third graders, in groups, dissect a variety of brands of chocolate chip cookies and calculate the mean for each brand. They create their own bar graphs, pictographs, and line graphs to represent information.
Curated OER
Geometry and Shapes in the X-36
Learners describe, draw, and classify shapes. They use the internet to research the X-36 aircraft. Students identify the geometric shapes in the aircraft. They calculate the number of sides in an x-36.
Curated OER
A thousand seconds
Students use seconds, minutes, and hours. They then discuss the size of a thousand. After that they read time in digital or analogue form.
Curated OER
Points
Students listen to Gill's story and determine how many number points she has. They then find the number of points their own name has and get into groups where all the name points are the same.
Curated OER
Disappearing Magic Factors
Students identify, through the number of rows and columns, the factors related to the product. In turn, they also discover how to find the missing factor, which is part of the fact family for that product.
Curated OER
Multiple Ways to Add and Subtract
Third graders recall multiplication facts to tens. They recall factors of numbers generated by multiplication facts to ten. Students become familiar with the use of brackets in notation. They multiply two digit numbers by a single...