I've been teaching remedial mathematics for the better part of a decade, and I've noticed a big trend in my classes lately. Many of my students are able to grasp the more complex ideas but still struggle with the basic facts (e.g., adding/subtracting/multiplying/dividing negative numbers; properties of 0 and 1; basic multiplication and long division).
My Question: Have other CC teachers noticed a similar trend? For those of you who have--and maybe have more experience dealing with this problem--what have you done when confronted with this issue?
Perhaps an example will help to clarify my question some more and to narrow down the broader questions. In some of my current remedial math courses, I took time out of the regular curriculum to focus specifically on the times table, properties of integer operations, and properties of the identities. Here's an excerpt from one of the worksheets I gave them.
Complete the following sentences by filling in the blanks.
A negative number multiplied or divided by another negative number is...
A positive number multiplied or divided by a negative number is...
...
A number divided by one is ...
A number divided by zero is ...
A number divided by itself is ...
Compute the answers to each of the following.
$1\div 1=$
$-1 \div (-1)=$
$-1\div 1=$
$1\div (-1)=$
$1\times 1=$
$-1\times (-1)=$
...