What are GMOs? How is genetic modification done? Can genetic modification help to reduce the impact of human activities on natural systems? Plasmids are DNA that determine the traits of bacteria. Transform bacteria by inserting a plasmid and examine the results of this transformation. Compare this process to the techniques currently used in food production.

Students are asked to explain how the sun is a major source of energy. [0:32]

Very extensive report on the poverty trends among females in the U.S. and the reasons for these trends. Also contains information on recent and past poverty rates and ratios.

Help your students understand one way to harvest energy from biomass -- by fermenting a plant-based sugar!

A video exploring the process of fertilization where two sets of chromosomes come together to form a zygote. Video defines haploid, diploid, zygote, and fertilization. [10:26]

Khan Academy learning modules include a Community space where users can ask questions and seek help from community members. Educators should consult with their Technology administrators to determine the use of Khan Academy learning modules in their classroom. Please review materials from external sites before sharing with students.

This video describes the role of the brain in regulating body temperature and how sometimes fever is employed to fight off infection.

In this interactive lesson, students take a closer look at some of the women who risked their lives to fight against systemic racism in the United States during the Progressive Era.

Do you know how long it takes your heart to beat 100 times? Test your estimation and number sense skills with this problem-solving challenge. A one-page activity taken from the NCTM Math Challenges for Families Collection. Hints and real-world applications included.

If you like tackling formulas, then this math challenge is for you. See if you can calculate Helix's BMI (body mass index) and find out if his health is at risk. A one page NCTM Math Challenges for Families activity that engages learners in real-world skills.

Try this real world challenge that focuses on data collection, data analysis, and problem solving with information from the U.S. Census Bureau. Discover how these skills are applied in real life situations in this one page activity from the NCTM Math Challenges for Families series.

Use this site to figure out if women really do live longer than men. A math challenge taken from today's health journals that explores data collection, data analysis, patterns, and graphing skills. Learn how mastering these skills can be useful in real life situations in this one page activity from the NCTM Math Challenges for Families series.

Use your algebraic reasoning to solve this math challenge that explores the relationship between quantities and weights. Try this math challenge from the NCTM Math Challenges for Families series. Also, discover how mastering this skill would useful in real life situations.

Take the math challenge. Can you figure out how long you have to wait in line to buy a ticket? An estimation and time measurement challenge from the NCTM Math Challenges for Families collection. Based on real-world themes and application. Hints are included, if you need them.

Students, teachers, and parents alike will enjoy this challenging math site. It contains a clever brain teaser section plus creative problems related to algebra, geometry, measurement, numbers, statistics, and probability. A Spanish version is available.

Try this probability challenge from the NCTM Math Challenges for Families series. See if you can figure out the probability of putting three checks in the correct envelopes without looking. Also, discover how probability skills are used in real life situations.

Can you break the magic number code? Test your algebra aptitude in this challenge that explores number generalizations, symbols, and equations. Discover how algebraic procedures are used in everyday situations in this one page activity from the NCTM Math Challenges for Families series.

If you're superstitious you may want to try this math challenge. Test your reasoning and number sense skills by finding out if there is a Friday the 13th every year. Discover how understanding number patterns and reasoning can be helpful in real life situations. This is just one of the activities from the NCTM Math Challenges for Families series.

This resource presents an interesting challenge for the serious mathematician with strong reasoning skills. Explore proportional reasoning, probabilities, fractions, and ratios in this challenge to figure out if you always get six hours of recording on a 120 minute video tape. A one page activity from the NCTM Math Challenges for Families collection that connects this skill to real world applications.

Math activity challenges you to determine how many different ways there are to get to your destination.

Meet Oscar Ostrich. In this fable, Oscar Ostrich is taught to think about his future needs and set financial goals to become more confident about his financial future. The story is centered on the moral: "If you set and reach financial goals, your needs will be met in the future."