Curated OER
Introduction to Measures of Central Tendency and Variability
Learners calculate the mean, median, mode, range, and interquartile range for a set of data. They create a box and whisker plot using paper, pencil and technology.
Curated OER
Sexual Reproduction and Meiosis
In this biology instructional activity, 9th graders create one chromosome using a red plasticine and another using blue plasticine. Then they illustrate different ways of crossing over, including double crossovers. Students also explain...
Curated OER
Estimating Turtle Size and Age
Students investigate how to estimate the age and size of turtles, and examine variability in scientific data. They read an informational handout, identify the parts of the shell, measure the shell and estimate the age, and record the...