There are no answer keys for grades 1 thru 4. Textbooks for grades 5 and 6 have answer keys in the back. We do not. The link to this website is published here with the permission of Jenny Hoerst. Teacher guides are no longer available till further notice.
Individual teachers approach the process of oral drill and use of manipulatives differently.
There is, however, great emphasis on homework and practice. The PM workbooks are intended to be completed by students without assistance. As with any program, effective supervision plays an important role. The student is expected to do all the work in the workbooks independently. Teachers in Singapore use simple manipulatives such as flash cards, charts and 3-dimensional objects.