Technology should be tied to the objective to keep the 21st century learner focused on the TEKS-based goal of the lesson. Most students love technology and can relate to it better than always pushing a pencil!
Why should we hold students accountable for the stations/centers?
Students need to be held accountable because they need to be able to demonstrate mastery of the intended objective by showing the result of their learning, so that teachers can monitor their understanding of the concept.
I like two of the accountability suggestions offered from exploring this tool and that is for students to complete an open-ended questionnaire and also sign their name on what they actually produced at that station.
I visited the Mangahigh link to view the interactive website since I am certified to teach secondary math. I liked this free games-based resource site and think it could be used as a station to keep students accountable by allowing students to practice Algebra facts in a fun way. It currently has facts up through Geometry, so more-advanced students could practice the geometric concepts for their next level class once they have mastered the Algebra 1 concepts.
The second link I visited was Manipula Math with Java. I also liked this site and could use it in stations to keep my Computer Science students accountable by letting them select an interactive Java applet program with lots of animation. The CS students love math and would find it challenging to explore this interactive website when we are coding Java applets.
Two apps I could use if I was part of the rollout on getting any iPod Touch/iPads would be Thinkfinity and Interactivate to use with math students in a fun, interactive way, so that students would stay engaged in learning.