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...
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...
Cold Spring Harbor Laboratory
Evolution Begins with the Inheritance of Gene Variations
Connect Mendelian genetics with Darwinian theories. An interactive lesson lets pupils explore how George Shull used research from other scientists to explore genetic variation. The resource outlines the statistical analysis of genetic...
Cold Spring Harbor Laboratory
Specialized Chromosomes Determine Gender
Are you an XX or an XY? Budding scientists learn about cellular fertilization and the determination of gender in a thorough online lesson. They follow their study with a set of interactive reflection questions.
Cold Spring Harbor Laboratory
Sex Cells Have One Set of Chromosomes; Body Cells Have Two
What's the difference between body cells and sex cells? Learners explore the question and the process of meiosis using an interactive lesson. An animation describes the discovery of meiosis and describes its phases for a detailed and...
Cold Spring Harbor Laboratory
Genes Are Real Things
Proving microscopic structures exist is a difficult task. Learn how scientists did just that in the mid-1800s as they set out to identify the cellular structures related to genetics. The online lesson explains the collection of work that...
Cold Spring Harbor Laboratory
Genetic Inheritance Follows Rules
Rules are not meant to be broken in genetics. Scholars learn to build Punnett squares to track the inheritance of dominant and recessive traits in an interactive animation activity. Online questions help individuals reflect on their...
Cold Spring Harbor Laboratory
Some Genes Are Dominant
Dominate a lesson on genetic traits. Young scholars learn about the difference between dominant and recessive traits with an interactive lesson. An animation demonstrates Mendel's work on the inheritance of traits, and interactive...
Cold Spring Harbor Laboratory
Genes Don't Blend
Yellow and blue make green—unless you're studying the inheritance of genetic traits. An interactive lesson explains the difference between blended traits and pure traits and gives examples of their occurrence. The resource includes a...