TED-Ed
TED-Ed: A brief history of numerical systems - Alessandra King
1, 2, 3, 4, 5, 6, 7, 8, 9 and 0. With just these ten symbols, we can write any rational number imaginable. But why these particular symbols? Why ten of them? And why do we arrange them the way we do? Alessandra King gives a brief history...
Curated Video
Collect Data
Mr. Addit reviews three kinds of charts and graphs: the tally chart, the pictograph, and the bar graph.
Curated Video
Organizing Data
In this video, students learn to collect and organize data using tables and charts. We use tally marks as a counting strategy by creating groups of five. Yo ho yo ho, a pirate's life for me!
Curated Video
Reading a Pictograph
“Reading a Pictograph” explores tally charts and how to interpret pictograph data to answer questions.
Curated Video
Constructing and Interpreting Two-Way Tables
The video is a lesson on constructing and interpreting two-way tables. The teacher explains the vocabulary associated with two-way tables, such as joint frequencies and marginal frequencies. The teacher also provides examples of two-way...
Curated Video
Congruent Figures
In this video lesson you will learn about congruent figures. We will learn the definition of congruent figures. Students will learn how to identify corresponding sides and corresponding angles to determine if figures are congruent....
Khan Academy
Khan Academy: Intro to Place Value
Sal uses the number 37 to explain why we use a 'ones place' and a 'tens place' when writing numbers. Includes a video, transcript, and question and answer section. [5:58]