• "Learning is experience. Everything else is only information" A. Einstein

    “Scientific observation then has established that education is not what the teacher gives; education is a natural process spontaneously carried out by the human individual, and is acquired not by listening to words but by experiences upon the environment.” 
    ― Maria MontessoriEducation For A New World






    Watch the video and try to find out what the experiment is about and how it is going to end... 

    Watch the pictures in the padlet below... and GUESS!!



    In this activity students of 2 K and 2 J are asked to observe carefully what they see through the microscope objective and then draw it on a sheet trying to add as many details as possible. 
    It was an effective way to introduce the topic of cell structures. Students have observed different kinds of cells (from onion tissues and from the inside of cheek). Then they have drawn and answered some questions that have guided them in further investigation and research activities.


    EXTRACTING DNA FROM FRUITS AND VEGETABLES (in this case we have extracted dna from kiwi fruits and banana)

    •     Fill a measuring cup with a half cup of hot water and a teaspoon of salt.
    •     Pour this saltwater into the bag, and close the bag. Gently mix and slosh the saltwater and mashed banana together for 30 to 45 seconds.
    •     Add a half of a teaspoon of dishwashing detergent or dish soap into the bag. Again, mix around the contents gently. You do not want the mixture to become too foamy.
    •     Place the bottom half of a coffee filter in a clear glass cup. The top part of the filter should be folded over the rim of the glass to keep it in place.
    •     Carefully pour the contents of the bag into the filter and let it sit for several minutes until all of the liquid has dripped down into the cup. (You can now throw out the coffee filter and its contents.)
    •     Take the rubbing alcohol from the refrigerator. Tilt the glass and slowly pour the alcohol down the side of the cup until there is a layer that is 2.5 to five centimeters (one to two inches) thick. You want to keep the alcohol and the liquefied banana as separate as possible, so complete this step slowly.
    •     Let this two-layered mixture sit for eight minutes. During this time, what do you see happening between the alcohol and the banana liquid layer? It looks cloudy and may have some tiny bubbles in it. The longer you wait, the more defined this layer becomes. This is the DNA pieces clumping together.
    •     Stick the wooden stirrer into the cup. Spin it in place so that cloudy layer spools around it. Remove the stirrer. Can you capture some of the stringy middle layer on your stirrer and remove it from the cup? The substance that you see on the stirrer is DNA!