Conheça o xn--xcincia-lya.org, meu blog com recursos para o ensino de ciências. Experimentos, abordagem maker, uso de TICs em sala de aula e mais.

Sent my proposal for a presentation @ChemEd2025 today! ChemEd is the best conference for chemistry teachers that I have been. Looking forward to the conference and to get to know Colorado.

I made some Avogadro Number scrolls. A long banner with some 3D printed parts that fit on the wood bars on each edge. The idea is to make a slow reveal of the number in class, thousands, millions, billions.... up to 602 sextillions.

The students are doing an evaluation using microscale reactions today. They have to describe what they observe and draw models of what happens. Just like @UncleBo80053383 Power point animations.

This is my potato cell clock. The googly eyes were done in Photoshop (but I want to get some real ones for when I use this on class). Designed with @tinkercad and 3d printed in PLA.

Today is laser day. I am at our school's makerspace cutting some resources for my Chemistry classes. Lots of nice things you can do with a laser cutter/engraver.

Today the students explored several polymer experiments... Do you know them all?

Yesterday the students did a rotation that included the salt + ice + wet thread experiment. Always good when there's a surprise in the end.

Have you ever done the evaporation races? 2 liquids compete and the sts discuss the intermolecular interactions and their relative intensities. I've made this board using laser cut MDF. You wet cotton balls with each liquid and make a trace. Water x ethanol x i-propanol x acetone

I am in London for a few days. Today I went to the natural history museum, a lovely building (if a bit cold) and a very nice collection. I plan to visit the Royal Institution and the Faraday museum tomorrow.

Using my laser cut molecular model today in class. Diamond, graphite and fullerene. Low cost and a nice size for the classroom.

Not easy to find a top hat for magic tricks, so I 3D printed a small one. Then you open a dimensional portal inside of it and the objects disappear (if they are made of styrofoam). It helps if you place a solvent in a glass container inside of the hat. I used limonene.

The students are working with molecular models to study interactions in a rotation. With our low cost laser cut model set I have no worries if some pieces break or are lost.

I made this cardboard laser cut "puzzle" where the student has to place all the pieces and names. Should I make a version in English to share? I plan to make one more with other functional groups. Which ones should be included?

A different version of the tic-tac conductivity apparatus (minus tic-tac box). 3d printed battery holder and laser cut base. Not sure who created the first version, @UncleBo80053383 @CLEAPSS ? Using pop rivets instead of graphite or carbon fiber rods.

You want to explain how do we know how much of each isotope is present in nature? First talk about the mass spectrometer and how it separates atoms (and molecules) by mass. Make your own "mass spec" and show it to your students. youtube.com/watch?v=Igb48C22…

Do you like to use props to help your students visualize things? I made these cubes with the volume of 22,7 liters using 3d printing and plastic straws. That is the volume of 1 mole of any gas at STP conditions. Made with @tinkercad.

Got this set of 15 element cubes. They are really small (1 cm side). Really interesting to compare the densities of Mg and W in your hand.