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Compare sizes of planets with this free webtool.

"WWF's goal is for the world to develop an equitable low carbon economy by 2050, which is resilient to that level of climate change which is unavoidable. All efforts should be undertaken to keep warming of global average temperature below 1.5°C (compared to 1850). "

"Preparing the students of today to become productive citizens of the future requires our educational system to promote life-long learners who are able to work together to solve realistic problems and develop a basic understanding of the natural and humanly modified world around them. Information presented in a familiar and mind-engaging context leads to greater understanding and retention, as compared to memorization of facts in isolation. Research indicates that retention is greatest when students are actively engaged, put their knowledge into immediate practice, and become "teachers" of other students. Children's Engineering activities directly address these issues."

Both of these interactive charts could be useful in starting lessons about energy and natural resource consumption. Have students use both interactives to see how they compare to others. Then ask students to identify opportunities for reducing consumption.

Students play the role of birds, go out on the school lawn, and pick up toothpick "stick worms" which have been previously scattered on the lawn in equal numbers of green-stained and unstained. "Birds" are chased away before the "worm population" drops too low. Back in the classroom, the number of green and non-green "worms" are compared individually and for the whole class. Discussion relates the experience to the elements of natural selection. As presented here, it does not lend itself to demonstrating the effects of selection over multiple generations.

Girls who play video games are three times more likely to choose physical science, technology, engineering or maths (PSTEM) degrees compared to their non-gaming counterparts, according to new research from the University of Surrey

Step by step comparison interactive guide between mitosis and meiosis

NOVA animation comparing mitosis and meiosis.  Also includes brief explanations of what happens in developing egg cells versus sperm.

"Most of the time, when a cell in our bodies divides, each new cell carries a complete set of chromosomes. The cells involved with human reproduction, however, carry only half after division occurs. In this step-by-step explanation, learn about mitosis and meiosis, the two types of cell division."