May27

Tadpoles are baby frogs

What percentage of children ever get to see a tadpole grow into a frog? Reading about tadpoles amazing metamorphosis into adult frogs is less amazing than observing the living animals and noticing a daily change in size or form.

From NSTA The Early Years Blog
The seasonal nature of this transformation means that young children may not remember the last time they saw it because it happened one third of their lifetime ago, so teachers may want to repeat this observation activity every year. There are concerns among scientists that even common species of frogs and other amphibians are facing extinction because infectious diseases are damaging their ability to grow and reproduce. To prevent any accidental spread of disease causing organisms, officers from the Society for the Study of Amphibians and Reptiles (SSAR) and Amphibian Ark wrote a letter to the editors in the 2009 April/May Science and Children (also posted at www.ssarherps.org) describing the strict but feasible hygiene conditions and procedures that must be followed by anyone keeping and then releasing amphibians into nature. They said that observing live amphibians “is a great approach for fostering “bioliteracy”.” IF YOU KEEP LIVE TADPOLES AND OTHER AMPHIBIANS IN YOUR SCHOOL PLEASE READ THE EXPANDED LETTER, "Considerations and Recommendations for Raising Live Amphibians in Classrooms, SSAR’s response to a recent article in Science and Children” . 

I won’t quote from the letter because I believe it’s important to get the accurate information in the entire letter but will say that bleach is used in the disinfection procedure.

Now that you know where to get information on how to prevent the spread of disease in amphibians by classroom activities, here is a photo of the baby Wood frog, newly released back to the pond where it hatched. I wish I could have taken each of my students (a few at a time!) with me to see the frog in its natural environment.

From NSTA The Early Years Blog

Please read the letter and follow these best practices so that generations of frogs will be alive to inspire wonder in generations of children, both animals that are growing and changing.

Perhaps we will be inspired to create school yard habitats so children can observe animals in nature every day.

Peggy

Published: May-27-09 | 0 Comments | 0 Links to this post

May26

Standards and guidelines are great resources for lesson planning

Wanting to use best teaching practices and develop my students’ science thinking to the best of their capability, I look at what governments and curriculum developers think should be happening in an early childhood classroom, and what topics should be taught. When are children able to understand what makes a “fair test” and ready to experiment in addition to doing activities? Is learning about the solar system best taught in preK or in grade 2? What big ideas can be learned through a unit on the ever popular dinosaurs?

Do your curriculum and state standards seem as well thought out and complete as others? Do they cover the science content areas or objectives that you feel they should? Are there gaps? Are the standards appropriate for your grade? What content should be mastered before students arrive in your classroom? Standards and guidelines are great resources for lesson planning.

Look at some other guidelines to judge for yourself if you are meeting children’s needs for science learning. In alphabetical order:

Benchmarks for Science Literacy, http://www.project2061.org/publications/bsl/online/index.php  

HeadStart Child Outcomes Framework, http://www.hsnrc.org/CDI/pdfs/UGCOF.pdf 

National Association for the Education of Young Children (NAEYC) Early Childhood Program Standards, http://www.naeyc.org/academy/standards/ 

National Board for Professional Teaching Standards (National Board Certified Teachers), http://www.nbpts.org/for_candidates/certificate_areas1?ID=17&x=61&y=4 

National Science Education Standards (NSES), http://www.nap.edu/openbook.php?record_id=4962

 

Can you recommend any standards that you think we can all learn from, or should try to meet to the best of our ability?

Peggy
Published: May-26-09 | 0 Comments | 0 Links to this post

May25

Science talk

One misconception about science is that discoveries or new ideas are “discovered” then agreed upon by scientists in a complete form. Talking to children about the process of scientific inquiry as they do an activity may help them appreciate the long, exploratory, route to being certain in science. Foster discussion by letting children know it is okay to disagree about what you think might happen.

From NSTA The Early Years Blog
These children are pointing to answer the question, “What shape bubble will you make with a square bubble wand?" and they are comfortable disagreeing with their neighbors.

As you do science with young children, include comments about science, such as these, in the discussion:

  • I hear more than one answer. That’s how science is, people don’t always agree. We can try this and find out.
  • Observations may not be the same. What do you see?
  • Sharing your information about what you see is what scientists do.
  • Yes, we can look in a book. Scientists research what people have learned already.

Here are two resources that explain how science talk is part of the process of science:

A good visual explanation of how science works is available from the Understanding Science website. See "The real process of science" showing the nonlinear paths in doing science.

For more about talk in science teaching, view a slideshow by Karen Worth of the Educational Development Center, Inc., Science Talk and Science Writing: A View from the Classroom, at the 2008 Literacy InstituteThe Inquiry Diagram (slide six) is another clarifying diagram about the process of scientific inquiry.

Some students may need repeated encouragement to talk freely; others may need a reminder to listen. Listening to my students helps me find out what they know about science.

Peggy

Published: May-25-09 | 4 Comments | 72 Links to this post

May06

Caterpillars all around

Certain trees in my neighborhood are currently supporting populations of growing Eastern Tent Moth caterpillars. Children were excited to tell me about the “nest” they saw “way high” up in the tree (about 15 feet up). The wild cherry (Prunus serotina) is often host to several clumps of these larvae, or baby moths, until they pupate (make a cocoon and change into the pupa stage in life). I hope the children will be encouraged to bring paper and crayons out to the playground and draw what they see. When teachers model this kind of documenting of observations, children often want to do it too! In warm weather the caterpillars climb all over the tree and are easier to catch. Cut a few branches and bring some caterpillars indoors for extended, closer viewing.

From NSTA The Early Years Blog
(Put the branch ends in water and into an enclosed container afterwards so the caterpillars won’t wander and can be put outdoors again.) 

A butterfly species with a large caterpillar, Eric Carle style coloration (The Very Hungry Caterpillar), and a short life cycle would be ideal for classroom observation, so children could see the larvae mouth parts munching, the pupa form appear, and a beautiful adult insect emerge within a month’s time. I often use the not-so-colorful Cabbage White butterflies to show a butterfly lifecycle because the caterpillars are easy to find on collard and cabbage plants (look on the underside of the leaves of decorative cabbage plants that go to seed as the weather warms up).

From NSTA The Early Years Blog
What local species are active in your area during the school year? (Add a comment by clicking on the word “comment” below. Hint: write and save your comment in a separate document to cut and paste in, because the anti-spammer “capcha” box may time out before you are ready to submit your comment. )

 Some species are endangered—check for “at-risk”, “threatened” or “endangered” status of North American species on the US Fish and Wildlife Species List (by state) , with the NatureServe Explorer  (search for “butterflies and moths” to see list), and with a local Lepidopterist (scientist who studies butterflies and moths), and read the Lepidopterist Society Statement on Collecting before collecting any caterpillars. Many state societies, such as The Ohio Lepidopterists have helpful websites.

Some caterpillars with hairs have stinging hairs and should not be handled. State Cooperative Extension Services (Florida, Hawai'i,  Kentucky, North Carolina,  Virginia) often have identification information.

Butterflies and moths—another animal shape to compare and contrast with our own. Pull out some scarves and pretend to become one!

Peggy

Published: May-06-09 | 0 Comments | 0 Links to this post

May02

What shape is your bubble wand? Children and making choices

The children were happy that I had enough of each color pipe cleaner (known as “fuzzy sticks” nowadays) that everyone could choose their favorite color. We wanted to make bubbles and needed to make bubble wands.

From NSTA The Early Years Blog

Children like to have choices (as do I). Choosing marker color, place in line, type of seed to plant, or which center in which to begin their day, can be so important for young children that they are willing to overcome shyness or difficulty with language to voice their choice. Being encouraged to choose and plan helps children develop thinking, and talking about what they might do in the future—important for science because part of being able to make predictions is to think about what has not yet happened.

After the class watched as I made bubbles of air in water, I asked the children to predict what shape bubble I could make with a square shaped bubble wand dipped in soap solution. My purpose was to raise a question in their minds, “What shape can bubbles be?” and ask the children to predict based on prior knowledge before going outside to blow bubbles. They had four shapes they could point to, to show their prediction, and we reviewed their names, square, cube, circle, sphere. The children pointed to the ball shape even as they said, “Circle.” They knew what they meant but were not yet familiar enough with the word “sphere” to use it. I use the word “round” much more often than “sphere”. If only sphere were a little easier to pronounce!

From NSTA The Early Years Blog

Recording a prediction or observation with tally marks is a kind of choice, but young children may not understand that they are choosing a representation of what they think or a reality that they have observed. On Friday in a large group follow-up to an activity where all the children moved water from container to container using various tools (see 3/22/09 post: Using tools to move water), one student was advocating for others to choose his choice of “favorite” tool. When we see children trying to influence their friends’ choice in recording a personal prediction or observation, we know that the child does not understand the purpose of tallying the predictions and observations.

From NSTA The Early Years Blog
Anyone have ideas for helping children understand that recording observations is not voting?

Here are two resources on early childhood and making choices:

The HighScope Educational Research Foundation, “an independent nonprofit research, development, training, and public outreach organization with headquarters in Ypsilanti, Michigan.” Research shows that planning and reviewing are the two components of the program day most positively and significantly associated with children’s scores on measures of developmental progress.

The Alliance for Childhood “promotes policies and practices that support children’s healthy development, love of learning, and joy in living.”

See the Alliance’s graphic about the continuum of children’s choice play in Kindergartens at: http://www.allianceforchildhood.org/sites/allianceforchildhood.org/files/file/Kindergarten_8-page_summary.pdf

What kind of choices in your class support science learning? Tell the rest of us about what your students choose by adding a comment. Click on the word “comment” below. Hint: write and save your comment in a separate document to cut and paste in, because the anti-spammer “capcha” box may time out before you are ready to submit your comment.

Looking forward to learning from you, Peggy

From NSTA The Early Years Blog

 

Published: May-02-09 | 1 Comment | 1 Link to this post