Tag: my software

Stomata of a Basil Leaf

It’s not always easy to see stomata, the pores on the surfaces of leaves that allow plants to breathe. I tried the leaves of pepper and tomato plants with a dissecting microscope to no avail. However, compared to these, the stomata on basil leaves were enormous. They were actually visible on the lowest magnification (6x), but the higher magnification is necessary to make out the detail.

For these pictures, I was lucky enough to have gotten to try out one of Leica’s research grade, digital microscopes (the DMS1000b). Given that I only had a hour or so, I did not take the time to experiment with all the optimization options, however, the pictures turned out remarkably well, none-the-less. In particular, you might note the highest magnification images, labeled 48(d)x, are just digital enlargements from the 48x magnification pictures.

Having the built in camera makes it an awful lot easier to put images into the online microscope app, and I suspect will make focus stacking a lot easier as well. Since this scope is a bit out of the range of my small high-school budget, I really need to figure out a good, solid way of mounting my point-and-shoot cameras on the microscopes I have.

Mariner AO: Discovering the Americas

The route of the good ship Bobert II.

We just used my sailing game, Mariner AO, to help wrap up the group presentations on the European exploration of the Americas, and it worked wonderfully!

The small groups did their presentations timewise, starting with the Vikings (don’t ask me about Leprechauns), then the Spanish, the French (don’t ask me about giant sharks and flying pigs), and finally the English. At the end, we had half an hour left, but instead of just tying it together with a graphic organizer, I wanted to show them Mariner AO because the North Atlantic wind circulation ties in so wonderfully well with the pattern of colonization.

I started trying to show it off as a group, having them tell me which direction to sail the ship to get to the Americas. As you could probably predict that didn’t work particularly well. Everyone was yelling out directions at cross-purposes; however, it did give me the chance to show them all how the game worked.

Even with all the confusion the group seemed to like the game. Someone even suggested, “Why didn’t we do this for group work.” And I though, “Why not?” So the class broke apart for 25 minutes to see who could discover America first.

There was a lot of excitement in the room. I offered them extra points for the team that reached America first. They all know how empty that reward is by now so I think most of the excitement really came from being able to play a game with a little bit of competition.

Building a ship to try to discover America.

The website still has a few bugs, especially on our older computers, but it worked. Three of the four groups reached the Americas, though two of them landed on the Canadian coast. The third group may well have ended up there as well, but I dropped a hint about Columbus’ route that sent them sailing into the Caribbean.

At least two kids planned on trying it at home. I had to pry one of the groups away from the computer so they could get their end-of-the-day jobs done on time.

We took screen captures of routes they took, and tomorrow we’ll put it all together, talk about the trade winds, what Columbus knew, and why the Iberians colonized South America while the French and English ended up mostly in the North.