I'm in a bit of a lesson planning rut.  I teach at an all-boys high school and I'm having some problems with the 2nd graders.  My school divides the students by their levels and the mid-levels are giving me the most trouble.  I taught them in 1st grade so we know each other fairly well at this point. 

What sort of active lessons do you use with your students?  Not necessarily PPT games because I feel like I've been beating that dead horse for awhile.  Perhaps if they like them I should stick with it?  I think part of me is worried about my co-workers thinking I'm slacking off, and the other part is my students not learning anything from my class.   

If you have any ideas or suggestions, please send them my way.  I have a short time to turn these classes around and I would really like to do so!

I teach the same age group - high school boys. They also happen to be mid-level and divided by ability.

I save bomb games for review after completing a series of lessons. We did play a scatagories type game during one of our classes to review vocabulary and check comprehension and once the students had figured out exactly how to play the game I think they really liked it and we'll probably play it again in the future.

I played a review "game" at a previous high school and in my after school class where groups of students had to complete a worksheet together and when they completed it they had to answer a review question before moving on to the next worksheet or task. In other words, I gave them worksheets, told them to work together in their groups but compete against their peers and they buckled down and really worked hard - I've never seen any of my classes so quiet as they tried to finish the worksheets and get the prize.

Other than that I don't really play games in class - I just try to pick topics that they're interested in and want to talk about. We've been talking about food - describing the taste and texture so I did a lesson on "bizarre" food around the world and I was quite surprised how interested the students were in the topic - some so much that they literally moved their chairs so they could see the screen better.

Same as crossthebreeze and miss_cho.
For my celebrities lesson I show pictures of famous people when they were young and see if they can guess who it is. It's a good warm-up activity to get their attention.

My boys loved a game I did a few weeks ago. We sat in chairs in a circle, minus one chair. The person without a chair stood in the middle of the circle and they had to finish the sentence, "Someone who..." For example, "Someone who is wearing glasses. Someone who has a sister. Someone who graduated from ___ middle school." Then whoever has the quality described has to find a new chair.
They loved the game because they got to physically move around the room, and though my girls' classes didn't do so well at sitting down on the chairs without flipping backwards, I was surprised to find that the boys' classes definitely sat down gently when they knew they couldn't play anymore if they kept falling down. Boys' classes never fell more than once. I was very impressed.

It's an easy game for those who are good at English, but it keeps everyone listening to the English spoken and gives most students a chance to be creative and speak. Even the students that usually don't speak in my class were forced to create a sentence in English. And when they didn't know a word they wanted to say, the boys helped each other out...It was nice to see.