Tables :: Data Entry In Matrix Format

I am designing a little database to hold physical activity log info for 2 school districts, required by a grant. Four-five times each year every kid (2000) will complete a log form for 3 days that lists separately for 34 intervals (1/2 hour each, from 7am - midnight) in which physical activity s/he engaged (59 options) and the level of effort of each (4 options, from light to very hard).

The log sheets look like a datasheet with 5 blank columns: #1 enter the activity code (1-59) and #2-5 mark an "X" in the column describing level of effort (light to very hard). There are 34 rows, each labeled from 7am thru midnight in intervals of 30 minutes. The kids **have to** enter an activity code and a level of effort on every row. They do this for three days in a row, 4-5 times during the year. (believe it or not ... federal grant requirement)

.........................#1 .......... #2 .........#3 ........#4 ....... #5
TimePeriod ......ActivityCode .Light ....Moderate .Hard ...VeryHard
7-730........ | .................. | ....... | ............ | ...... |............. |
730-8........ | .................. | ....... | ............ | ...... |............. |
8-830........ | .................. | ....... | ............ | ...... |............. |

I am maintaining survey responses (also 4-5 times a year) in this same database. I have a basic demographic table (Id, name, grade level, school). I am also maintaining eating habits (4-5 times per year) from food logs, like the activity logs, but these are for 5-7 days at a time. Finally, I will be importing number of steps walked for 4-7 days (also 4-5 times each year) from pedometer downloads, one per kid.

I have all tables and data entry forms except for this activity log set up, all data entered for the baseline period. What I would like to do with the activity log is something like a main form showing kid name, ID. I think I want to enter each row of the log (34 rows) into something like a datasheet, each row with a date field (I will use CTRL-' to copy down for one page of the paper log), and an activity code field (1-59 as codes) and a level of effort field (1-4, light to very hard).

What I think I want is one table for activity info, each record with these fields:

Kid_ID
Date_Logged
Time_Interval (these are the 34 rows, 7am - midnight, in 1/2 hour intervals)
Activity_Code (options 1-59)
Level_of_Effort (options 1-4)

I can see this in a datasheet format, but entering 2000 kids * 3 pages * 4-5 times a year [* 3 years] into Excel does not seem to be an efficient solution.

If I could open a form on the screen with a combo box to pick a kid and then pick a date, then fill in 34 rows of activity codes (1-59 as options) with a level of effort for each (1-4 as options), that would be great.

My obstacle right now is how to display 34 empty rows already loaded with an index related to the time interval, so that I don't have to enter that for each row -

Hence my subject descriptor, "data entry in matrix format". I am using Access 2007, Windows XP Pro (all service packs etc. up to date).