PBS
Pbs Kids: Curious George: Bug Catcher
This game from Curious George helps children learn numbers, counting, comparing sets, and numerical relations. Help Curious George figure out which group of bugs is bigger, and then catch them.
Better Lesson
Better Lesson: Bigger or Smaller
Second grade students are asked to apply two complementary processes: counting and grouping. The conceptual understanding of the place value of a number and combining/separating numbers using place value, are critical aspects of...
Other
Stat Soft: Statistics Glossary
Dozens of statistical terms are defined and illustrated in this glossary.
OpenStax
Open Stax: The Impact of Expansion on Chinese Immigrants and Hispanic Citizens
As white populations moved westward in the 19th century, Chinese immigrants and Hispanic Americans faced racism and discrimination and were unable to compete on an equal basis for land. Eventually, both groups settled into urban areas...
Illustrative Mathematics
Illustrative Mathematics: Picturing Factors in Different Orders
The purpose of this task is to help students picture the multiplicative structure of the number 30 in different ways. Some of this structure is easier to communicate using grouping symbols, as it is easier to interpret...