[Building Sakai] grade book / grade book 2 compatibility

[Matthew Jones]

I think it's cause some of the calculations of the final grades specially
were done in the user interface layer for Gradebook2 rather than in the
edu-services layer. And some of the features that I'd mentioned (extra
credit, drop lowest/highest and probably others) were added afterward
(mostly by Bryan) to the actual edu-services for gradebook [1] [2], but the
implementation and the calculation likely wasn't identical. And unless you
had the newest (trunk) version of Sakai, it likely would be missing some
calculations that Gradebook2 has.

And also for instance Gradebook2 doesn't support keep highest/drop highest,
which was also added [3]. So depending on which options the instructor used
the grades may appear different in the final calculation, which could be
concerning to a student. The actual points though would be the same and
nothing would be lost or missing.

[1] https://jira.sakaiproject.org/browse/SAK-19964
[2] https://jira.sakaiproject.org/browse/SAK-21225
[3] https://jira.sakaiproject.org/browse/GRBK-669

On Sat, Apr 14, 2012 at 2:22 AM, Steve Swinsburg
<steve.swinsburg at gmail.com>wrote:

> Interesting, a notice should definitely be made about this. I've used them
> in the same site and didnt notice anything strange, but it was only for
> simple grading.
>
> I don't understand how the calcs can be different though...
>
> Cheers
> Steve
>
>
> Sent from my iPhone
>
> On 14/04/2012, at 11:48, Matthew Jones <matthew at longsight.com> wrote:
>
> Agreed, both of these use the same basic data model, however there are
> some features that are may be present in Gradebook2 (or even in Gradebook)
> which aren't implemented in the other. So if one class was using both tools
> in the same site the calculations could be wrong. The one I know that was
> different was drop highest and lowest. This was for sure implemented
> differently in GB1 verses GB2. It wasn't even present in GB1 until 2.9.
>
> GB1 in trunk also has some features for extra credit (
> https://jira.sakaiproject.org/browse/SAK-21225 ) and GB2 also has these
> but implements these differently so like Bryan said if you're using one of
> the tools in one particular version of Sakai you might see one set of
> scores and another set in the other tool, which can be very confusing for
> students.
>
> At Michigan we'd generally strongly recommend that if an instructor placed
> Gradebook2 that they remove Gradebook. I even wanted to put up a warning
> message on both tools that notified the instructor pick one and either hide
> or remove the other if both were placed.
>
> -Matthew
>
> On Fri, Apr 13, 2012 at 7:12 PM, Steve Swinsburg <
> steve.swinsburg at gmail.com> wrote:
>
>> I've used both tools in the same site and haven't had an issue so far.
>>
>> Cheers
>> Steve
>>
>> Sent from my iPhone
>>
>> On 14/04/2012, at 6:37, Bryan Holladay <holladay at longsight.com> wrote:
>>
>> > I haven't tested lately, but for the most part the two tools don't
>> > work well together (i.e. if you put both GB1 and GB2 in the same
>> > site).  They use the same edu-services layer, however, there are
>> > discrepancies on which data columns they use (some overlap),
>> > calcuation methods, etc that cause them not to sync well (especially
>> > for more complex GB settings).  It would be nice to see those resolved
>> > (and theoretically it should be possible), but it may be a huge task
>> > given the complexity of the calculations and data structures.
>> >
>> > -Bryan
>> >
>> >
>> > On Fri, Apr 13, 2012 at 4:28 PM, Charles Hedrick <hedrick at rutgers.edu>
>> wrote:
>> >> As far as I can tell, Gradebook and Gradebook 2 use the same basic
>> data. To what extent are they compatible? GB 2 has a couple of additional
>> features, but they are being moved to GB, partly in 2.9 and partly in 2.10.
>> Are the two systems compatible as long as only features that are available
>> in both are being used?
>> >>
>> >> We currently have both available. GB 2 has more features, but we've
>> seen issues with it on some devices. If we could tell students that they
>> can see the data in GB even if the faculty member uses GB 2, that would be
>> helpful.
>> >>
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