PLAN C
MONDAY, MARCH 16, 2026
Montgomery County Schools decided to close early today, therefore the GISW is running on Plan C.
- Classes end at 1:45 pm.
- Lunch Break takes place in accordance with the regular schedule
- Buses leave school at 1:55 pm only and follow the
- Afternoon Program and Extended Care are cancelled.
- All afternoon and evening events are cancelled.
- For more details, please see the Standard Procedure for Cancellation of Classes at : /cancellation-of-classes.html
Nachdem Montgomery County heute ein vorzeitiges Unterrichtsende beschlossen hat gilt an der GISW Plan C.
- Der Unterricht endet um 13:45 Uhr.
- Die Mittagspause findet gem盲脽 normalem Stundenplan statt.
- Die Schulbusse fahren nur um 13:55 Uhr und folgen dem .
- Das Nachmittagsprogramm und die Sp盲tbetreuung finden heute nicht statt.
- Es finden keine Nachmittags- und Abendveranstaltungen statt.
- Weitere Details finden Sie im Standardverfahren zur Regelung bei Unterrichtsausfall unter: /unterrichtsausfall.html
STEM: 芦Touchable DNA禄
Isolation of one鈥檚 own DNA from oral mucosal cells
Each cell contains genetic information, the DNA (deoxyribonucleic acid). The DNA contains, among other things, the genes that code for ribonucleic acids (RNA) and proteins, which are necessary for the biological development of an organism and the metabolism in the cell. Chemically, it is a nucleic acid, a long molecular chain (polymer) of individual units, called nucleotides. The 10th grade students are already familiar with the structure of DNA and are now isolating their own DNA from cells obtained from the oral mucous membrane.
What equipment do you need to isolate and display human DNA, elaborate scientific devices and special chemicals? Much easier: cooking salt, dishwashing liquid, alcohol and some simple laboratory equipment such as disposable pipettes and test tubes. Actually, you could do this in your kitchen at home.
You shouldn鈥檛 eat before the experiment for about half an hour. The oral mucosal cells are dissolved with salt water and then mixed with detergent. The detergent breaks up the cells; their cell nuclei and the DNA are now suspended in an envelope of water molecules.
And now the 鈥淪chnapps鈥�: The mix is 鈥嬧�媍arefully covered with ice-cold alcohol which removes the DNA from the envelope of water molecules. The small, almost colorless balls that emerge are the individual DNA molecules of each student.
Bottled in little jewelry vials, the molecules of life can now be stored easily.
