I had a similar issue with Aleks last weekend. Which presented two topics side by side in the 3rd grade Fractions unit: Writing a Decimal and a Fraction for a Shaded Region and Tenths and Hundredths Decimal Place Value. My son saw the word fraction, went with the familiar and #1. Then called me to explain what those tenth and hundredth were about. Once he completed the topic I noticed that the other one had been available all along. Aaaaaargh!
We will note that he had already done money and addition of. Meaning that he had been handling tenth and hundredth already, although the decimal point and its meaning were never explicitly covered. Which is why I think Aleks is still very far from perfect... and apparently EPGY also has some way to go...
