How many birthdays do leap year babies have in a lifetime? Learners explore the question among others in a lesson focused on different calendar systems. Given explanations of the Julian, Gregorian, and Martian calendars, individuals use...

How are your second graders progressing in their math skills? Find out with a series of math assessment activities. With baseline assessment score sheets for each skill, you can track how well your kids are adding, subtracting, telling...

Cultivate the tree of knowledge using diagrams with two stages. Pupils create small tree diagrams to determine the sample space in compound probability problems. The lesson uses only two decision points to introduce tree diagrams.