The whole point of the excercise was to cut costs! The added hardware, software and administration required would be phenomenal!
You would require an massively beefed up Wireless network to handle the extra bandwidth requirements - £££££'s
Many schools do not have existing network hardware capable of VLANing and those that do will frequently have mixtures of manufacturers/802.1q implimentations forcing upgrades/replacements. = £££££'s
To allow access to internal non-web resources you would require not only internal network filtering capable of stateful packet inspection but also extensive application layer filtering = £££££££££'s
You would require AV inspection and MAC tagging for each machine brought into school and that could be a phone, PDA, Laptop or netbook. Many students may have at least 2-3 of those.More hands-on admin. = £££££'s
You would lose the control you have through Directory services (AD or otherwise) in controlling access, software installation & update/patch management. More hands-on admin. = £££££'s
You would not be able to accept all those devices onto your Acive Directory (as if you wanted too) because most will not have OS's capable of joining a domain/AD.
With the exception of browsing - teaching staff could not hope to plan lessons using particular software because of the massive differences in availablilty/version/fixes/updates etc,.
Many students simply don't have a laptop/netbook of their own.
Those that do may not even want to bring it into school - opening up their private teenage internet activities to potential scrutiny.
Parents/guardians may not even want their children to take an expensive items like laptops to school for fear of damage/theft.
Considering the numbers of mobile phone muggings - I hate to consider the student safety once a school is known to have students walking to/from school with laptops.
I worked at a large secondary (in a comparatively affluent area) that opened up such a scheme to the Sixth Form. Out of around 200 students - we only had a dozen or so laptops brought in.
Yes - the Charging, insurance etc,. could easily be taken care of with disclaimers that have to be signed by the student/parent/guardian etc,. but that is the tip of the very large and very costly iceberg.
Jon
Lawson Broadhead IT Consultancy