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MERLOT II


    

Comment


Material:

Interactive Chemical Reactions PowerPoint

Rating: 4 stars
Used in Course: Not used in course
Submitted by: Chris Hren (Teacher (K-12)), Jun 22, 2011
Comment:

First let me say that I think trying to address chemical reactions in this StAIR is a very admirable task due to the complicated nature of them and the difficulty addressing some of the questions students sometimes have. With that said, I think you did a very good job in doing just that. There is so much that goes into reactions and I believe you did a great job of trying to cover all of that information throughout the presentation. I liked that you reviewed formula writing and balancing along with the information presented about reactions. In addition, I think choosing only three types of chemical reactions for the StAIR was a good choice and one that made it something you could realistically do. I know that once you get into single and double displacement reactions the amount of things that must be dealt with increases dramatically and in truth I don’t believe those could be covered in something like this without spending an unbelievable amount of time designing it. So in short, I think this is just right.

However, there are a few things I would have changed to make the presentation flow a bit better. First, I thought there were too many animations throughout the presentation. I realize that this might be my own personal opinion but sometimes I just want to see the text and move on. I feel sometimes that people, myself included, feel the need to animate everything that shows up on a powerpoint slide when in truth sometimes that animation just slows the thing down. Another suggestion I have is the same thing I said for Tammie’s, which is to perhaps include some sort of audio track explaining the written text. I realize this adds an entirely new layer of work to the activity but I believe it might have helped for certain points with students who learn better audibly.

Overall though, I think it is a really great presentation!

Technical Remarks:

I only have two small technical aspects that I might take issue with. The first is that this PowerPoint ran really slowly on my computer throughout. I think that was due to the animations and PowerPoint being what it is. I know it was not my computer as it is quite powerful. I say this because I know most school computers do not have anywhere near the processing power of this thing and they might run the presentation even slower. They might have no problem though, it is just a thought. In addition, perhaps having the presentation begin automatically as soon as you open it would be a good idea. It would prevent the user from accidently clicking or doing something that messes it up before they begin the slideshow.

Time spent reviewing site: 40 Minutes