Infused technology barriers

What do you feel are the 4 top barriers you face that make the infusion of technology more difficult?

For one, science is primarily a hands-on content. Students can not feel the chemical reaction that occurs between two substances through the computer or ipad. Dissecting a rat is more memorable than watching on a computer screen someone else doing it or having a computerized version of a dissection. Secondly, as any person has experienced with the regrettable joys of technology, you never know when (and it will) fail. Whether it be the network crashing, the website not working or simply typing one wrong letter into the address bar. Thirdly, I find that even in this day in age not all students are very technology savvy. So not only do you have to manage students at a different pace concerning curriculum but also at a different technology pace. Lastly, resources are usually limited in the education world. In our district, we are lucky to have a 1:1 student to netbook but as a teacher you still have to prepare supplemental activities for that one student who forgot their netbook or has their netbook but their internet privileges are taken away. You still have to resort to books, paper, and pen even if technology is being infused.