Simple Data Extraction From 2 Tables

So these are a couple different interpretations I've made of a statement that needs to return students name's with the OSOS field in the attendcode code column of the attendance table on todays date with an attendance.aperiod column equal to 4.


This first one returns no results at all when I should get about 7 rows or so.....

Select Student.name,
attendance.studentid,
attendance.attenddate,
attendance.aperiod,
attendance.attendcode
from Attendance, Student
where AttendDate >= DateAdd(Day, DateDiff(Day, 0, GetDate()), 0)
And AttendDate < DateAdd(Day, DateDiff(Day, 0, GetDate()), 0) + 1
And aperiod = '4'
And AttendCode = 'OSOS'
AND student.name = Attendance.studentid

This one is returning all of the names in the database 6 times each.

Select Student.name,
attendance.studentid,
attendance.attenddate,
attendance.aperiod,
attendance.attendcode
from Attendance, Student
where AttendDate >= DateAdd(Day, DateDiff(Day, 0, GetDate()), 0)
And AttendDate < DateAdd(Day, DateDiff(Day, 0, GetDate()), 0) + 1
And aperiod = '4'
And AttendCode = 'OSOS' order by name

I think something is messed up with my WHERE control but I cant figure it out... Any help is greatly appreciated!