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Monthly Archives: April 2017

Many of you will be familiar with a ‘Snow Day’.  Here we have mud days.  It is raining every night and the soil is such that it is very sticky and slippery.  The ruts in the road become overpowering and take your car on it’s own course, but you have to keep going or you will be literally ‘sunk’.  Deo is a great driver and can get us out of our road, however you have to hold onto your seat because it’s quite a rough ride.  I think he would make a good winter driver although he may end you up on the wrong side of the road as people here often drive on whichever side has the best conditions.

Walking is also treacherous and your shoes hold the muck like nothing I’ve seen.  Anna went to school yesterday with plastic bags over her shoes.  She says the mud won’t stick to the plastic.

Because of the weather, we had a disappointing turnout at the workshop.  Only 4 teacher attended however the 4 were keen to learn and they had a good session.

Chemistry teachers were conducting an experiment to determine the energy contained in kerosene fuel.  They massed the fuel before and after heating a beaker of water.  They determined the heat used to heat by measuring the temperature change and related it back to the mass difference.

Biology teachers were testing exhaled breath vs. air in the room for CO2.  The apparatus was constructed from straws.  It delivers exhaled breath into the lime-water of one flask and above the lime-water in the other flask.    The lime-water is an indicator for CO2.  As the concentration of CO2 increases the lime-water becomes more opaque and milky.  It shows that the body converts oxygen in the air to CO2.





Physics teachers were using the meter bridge IMG_1328to determine the resistance of a wire.  I learned something new.  I learned that a bent wire has more resistance than a straight wire.  As shown in the photo, the bottom wire has a resistance around 1 ohm more than the straight wire.  We tested it with an ohmmeter.

IMG_1370This experiment is rather sensitive and requires consistency and thought. It also requires a fair amount of analysis.IMG_1405

Good workshop….bad turnout.  What can you do?


You might remember Tumaini Chacha.  He was the boy who took the suitcase of science apparatus to Mara region to spread  the word of science to students there.  He was one of the first scholarship recipients from DST.  This allowed him to pay of his secondary school dept and proceed to University.  He has been very resourceful and innovative in finding money for school fees since then.  He has now graduated with a diploma as a Medical Officer.  Tumaini has started a business providing medical testing and information.Anti Malarials

Here is an excerpt from his recent email….

“Personally I thank you much since in one way or another you supported me much and now I’m even able to pay a school fees for my young brothers and sisters. Currently I have taken them to Private schools,

Two are in form six and two are in form four for this year, so is something to thank God and all of you who put their hands on my studies.

Best regards.


“Hope God makes a way, I’m currently travelling very long distance for Testing and counselling my fellow Tanzanian about HIV/AIDS.

This is what I like and believe  most to help and put my hand to others life.

I thanks you again for your contribution to my studies and i hope to go back for Medical doctor bachelor by next year if my young’s will do better in their coming exams, means load will be less to me.”

I am very proud of Tumaini’s success story and the small part that Do Science played in his road.

I’ve recently retired (February) and am heading back to Tanzania on Wednesday, this time for a 6 month stay.  I’m looking forward to attending the April workshop for Do Science, seeing the teachers in person and getting some authentic, first hand feedback.