Cold Spring Harbor Laboratory
Higher Cells Incorporate an Ancient Chromosome
Chromosomes contain keys to history including links from royalty to Neanderthals. Young scientists learn about Ivan Wallin's research into chromosomes with an animation and videos. Then, the concept connects to mysteries related to...
Cold Spring Harbor Laboratory
Mutations Are Changes in Genetic Information
A red delicious apple tree with a simple mutation means we now benefit from the existence of golden delicious apples. Learn how simple mutations change genetic information in DNA sequences. Using biographies, videos, and animations,...
Cold Spring Harbor Laboratory
The RNA Message Is Sometimes Edited
In 1993, Phillip Sharp and Richard Roberts won the Nobel Prize for their discovery of split gene theory. Learn about the breakthrough with the help of an online interactive. Hear both scientists explain it in their own words, watch an...
Corbett Maths
Density
A short video introduces the triangle that illustrates how to find any value given the other two in the density formula. Class members use the triangle to work several problems to find the mass, volume, or density of an object.
Cold Spring Harbor Laboratory
Genes Get Shuffled When Chromosomes Exchange Pieces
Some genes link to others that have implications for inheritance. A set of resources lead pupils through the history of this discovery. They explain how chromosomes recombine and which parts are more susceptible to this linkage....
Cold Spring Harbor Laboratory
Chromosomes Carry Genes
Some traits only exist in males and some only in females. Pupils learn how the location of genes on sex chromosomes determines them using an interactive lesson. An animation illustrates how scientists know this to be true and shows how...
College Board
2018 AP® Environmental Science Free-Response Questions
Less than nine percent of all AP Environmental Science test takers scored a perfect five on the exam in 2018. Learn from the best answers as well as the common mistakes thanks to the College Board. Four questions from the test covering...
Cold Spring Harbor Laboratory
A Gene Is Made of DNA
Does a protein or DNA store genetic instructions for life? Follow the research from the 1920's experiments on mice through the 1940's experiments on bacteria to learn the answer to the difficult question. Scholars use an online...
Biology Junction
Mammals
Mammals include more than 4,000 species and represent the most dominant land animals on Earth. Scholars learn about the large variety of mammals, including orders unfamiliar to most. The presentation highlights the characteristics and...
Penguin Books
An Educator’s Guide to Ruta Sepetys
Historical fiction novels give readers a chance to step into someone else's shoes. An educator's guide from Penguin Common Core Lesson Plans provides resources to accompany three historical fiction novels written by Ruta Sepetys: Between...
Mathed Up!
Algebra: Indices
Indices and exponents mean the same. Pupils review exponential notation by watching the review video for the General Certificate of Secondary Education math assessment refresher. Scholars then use the activity to show what they know...
Corbett Maths
Average Rate of Change
Simply find the slope to find the average rate of change. A short video provides the definition of the average rate of change. Using the definition, pupils calculate the average rate of change to solve problems that cover finding average...
Corbett Maths
Instantaneous Rates of Change
Here's a great lesson that looks at slope as an instantaneous change. Using an estimated tangent line, the presenter shows the class how to find an approximation for the instantaneous rate of change. Scholars determine the slope of the...
Corbett Maths
Area under a Graph
What? The calculation of area is a linear distance? A short video shows how to use the areas of simple polygons to estimate the area under a graph. Pupils divide the area under a curve into figures to easier calculate the area. Given...
Corbett Maths
Shortest Distance between Line and Point
A short video shows how to find the shortest distance between a line and a point on the coordinate plane. Using the fact the shortest distance is the perpendicular, the presenter shows the class how to find the intersection of the two...
Corbett Maths
Quadratic Inequalities
Develop a sketchy approach to solving quadratic inequalities! Using a sketch of a graph, the presenter shows a way to solve quadratic inequalities. Pupils then practice that method to solve their own quadratic inequalities and apply the...
Corbett Maths
Algebraic Proof
Proofs do not exist only in geometry. The video shows the class different ways that proofs appear in algebra. Pupils work through a variety of algebraic proofs involving the divisibility of an algebraic expression or whether it is even...
Mathed Up!
Functional Maths Questions
Dang, it's a word problem! Pupils address a variety of word problems that involve knowledge of proportions and geometric topics. The General Certificate of Secondary Education review problems require determining costs based on area...
Mathed Up!
Questionnaires
Check the appropriate box. Class members determine whether a questionnaire is an appropriate one. The portion of the General Certificate of Secondary Education math assessment review requires pupils to create a valid questionnaire to...
Mathed Up!
Frequency Tables
The section of a larger General Certificate of Secondary Education math review requires pupils to summarize numerical data presented in a frequency table. Scholars determine the number of data points, the range, the mean, and the...
Mathed Up!
Probability and Relative Frequency
Go ahead and take a chance. Given the probability of an event, scholars determine the frequency of the event out of a sample. The part of a review series for the General Certificate of Secondary Education math assessment asks classmates...
Mathed Up!
Loci and Constructions
A General Certificate of Secondary Education math review has class members make basic constructions. Using a protractor and a ruler along with a compass, pupils develop drawings of triangles with given measurements. Scholars use their...
Mathed Up!
Compound Measures
Compounding is dividing units. Pupils practice using compound measures such as units for speed and density to solve problems that range from straightforward speed problems to those requiring conversions. The last few items challenge...
Mathed Up!
Volume of Prism
The area is essential to volume. As part of the review for the General Certificate of Secondary Education math assessment, a helpful video covers how to find the volume of several common 3-D figures. Pupils use the general volume formula...